OPINION OF THE COURT
When a federal officer executes a search warrant of a house, Section 3109 of Title 18 of the Federal Code generally requires that he give “notice of his authority and purpose” and be “refused admittance” before he may “break” into the premises. In this appeal we must determine whether the officer must comply with the announcement requirements of Section 3109 when he reasonably believes that he would be placed in unwarranted physical danger if he made such an announcement. Because we hold, as at least five other circuits have before us, that he need not comply in these circumstances, and that the facts of this case fall within this exception, we will uphold the seizure of evidence challenged in this appeal and uphold appellant’s conditional plea of guilty.
I.
In early 1977, agents of the Drug Enforcement Administration of the Department of Justice (DEA) learned from their New York office that an individual named Zelman Fairorth had ordered Phenyl Z Acetone from a chemical company. Phenyl Z Acetone is an essential precursor used in the production of methamphetamine, a schedule II controlled non-narcotic sub *976 stance commonly referred to as “speed.” Subsequent investigation and information supplied by an informant employee of Fairorth’s, Russell A. Weston, indicated that Fairorth was purchasing this and other precursor chemicals and selling them to Daniel Kane. According to the informant, Kane operated with two other individuals a methamphetamine laboratory located in a house rented by Kane at 322 Phillips Mill Road, Solesbury Township, Bucks County, Pennsylvania. Agents reportedly observed Fairorth purchase precursor chemicals and learned from an undercover state trooper that Kane had sold 2.8 grams of methamphetamine to him. On the basis of this information, the agents secured a search warrant for Kane’s house on June 8, 1977.
At about 2:15 p. m. on June 9, DEA agents, along with state law enforcement officials, approached Kane’s house to execute the search warrant. There were reportedly five people in the house at the time — Weston; Kane; Kane’s girlfriend, Melinda Hallock; one John DePaul; and an individual later identified as Fairorth. There were also reportedly four weapons in the house — two rifles, a shotgun and a .38-caliber revolver. 1 Under a prearranged plan, the officers divided into three teams, which were in contact by portable radio. The first team, which was comprised of Agents Frank Wicks and Patricia McCurdy, drove up to the house in an unmarked police car, and Wicks proceeded to the front door. The second team led by Agent Don Miller approached a side basement door. The third team covered the rear kitchen door. Agent Wicks knocked on the front door and explained to the man who answered the door, Fairorth, that he was searching for an individual referred to him by an antique dealer. The opening of the door was the signal for Agent McCurdy, who was sitting in the unmarked car, to instruct the other teams to enter the premises. The second team forced its way through the basement door and proceeded up the basement steps to the kitchen, admitting the third team through the kitchen door. The noise of the other units in the house led Agent Wicks to step through the door, grab Fairorth by the arm, and inform him that Wicks was a federal agent with a search warrant. Thus, at the point when the first officer of the second team entered the house, no officer had yet announced his identity and purpose.
The subsequent search of the house uncovered a methamphetamine laboratory and a quantity of precursor chemicals of methamphetamine. The agents also discovered on the premises a semi-automatic .30-caliber carbine, a Winchester rifle, two 12-gauge shotguns, two .38-caliber revolvers, and ammunition. Fairorth and Kane were charged with conspiracy to manufacture a controlled substance, manufacture of a controlled substance, and possession of a controlled substance with intent to distribute, in violation of 21 U.S.C. §§ 841 and 846. The trial date was set for January 4,1978, but Kane failed to appear, and a warrant was issued for his arrest. Fairorth was tried separately and convicted on all counts. Kane was apprehended in December of 1979.
On January 14, 1980, the district court considered a motion by Kane to suppress the evidence obtained in the search of the house on the ground that the search warrant was improperly executed. The court denied the motion on January 16. The same day Kane entered a conditional plea of guilty pursuant to our decision in
United States v. Zudick,
Kane argues before this court that the June 9th search violated 18 U.S.C. § 3109 because the agents failed to announce their authority and purpose before entering the premises. The government concedes, as it must, that Section 3109 applies to the search and that the announcement requirement of the statute was not met. It claims that this case comes within an exception to the announcement requirement of Section 3109 when the officer reasonably believes notice would place him in peril. Thus, we must evaluate whether there is such an exception under the statute; and if there is, whether the facts of this case fall within it. We will consider these contentions seriatim.
II.
Section 3109, Title 18 provides as follows: The officer may break open any outer or inner door or window of a house, or any part of a house, or anything therein, to execute a search warrant, if, after notice of his authority and purpose, he is refused admittance or when necessary to liberate himself or a person aiding him in the execution of the warrant.
Although the permissive language of Section 3109 does not specifically prohibit the entrance of police officers who have not complied with the notice provisions of the section, the section has been interpreted to exclude evidence obtained in a search where officers had not complied with these provisions.
Miller v. United States,
The statute embodies elements of the common law and protections of the fourth amendment prohibition against unreasonable search and seizures. It has been held to further three goals.
See generally Miller v. United States.
First, it “reduces the potential for violence to both the police officers and the occupants of the house,”
United States v. Bustamante-Gamez,
Finally, it symbolizes respect for “the individual’s right of privacy in his house.”
Miller v. United States,
The practicalities and exigencies of police administration, however, have led the courts to recognize exceptions to the announcement requirement. The statute itself provides that no announcement need be given “when necessary to liberate [the officer] or person aiding him in the execution
*978
of the warrant.” Three other exceptions were raised in a dissenting opinion of Justice Brennan in
Ker v. California,
(1) Where the persons within already know of the officers’ authority, and purpose, or (2) where the officers are justified in the belief that persons within are in imminent peril of bodily harm, or (3) where those within, made aware of the presence of someone outside (because, for example, there has been a knock at the door) are then engaged in activity which justifies the officers in the belief that an escape or the destruction of evidence is being attempted.
Thus, this and other circuit courts have recognized exceptions where announcement created a significant possibility of the destruction of evidence before entrance of the police officials; 3 when the individuals inside knew of the officers identity and purpose, thereby making an announcement a “useless gesture;” 4 or when announcement might lead to an escape by an individual being sought by the police. 5
We hold that a police officer’s reasonable belief that announcement might place him or his associates in physical peril constitutes another “exigent circumstance,”
Miller
v.
United States,
Of course, unannounced intrusions do not further the other goals of the statute — respect for the privacy of the inhabitants and the protection of personal property. The adoption by this and other circuits of an exception for destruction of evidence and flight from arrest, however, reflects a willingness to subordinate these interests to safety concerns when the needs of police enforcement clearly demand it. Surely if the destruction of evidence and peril to individuals
inside
the dwelling justify noncompliance,
see Ker v. California,
III.
We still must consider whether the police officers in this case had reasonable grounds for such belief. The reasonableness of their belief must be evaluated, of course, according to the facts “as the officers had reason to believe [them to be]
at the time of their entry. ” Ker v. California,
The prior cases in this area have arisen in a variety of subtly different factual contexts from which generalizations are hazardous. Nevertheless, the courts have generally found reasonable grounds for an exception when the inhabitants, as in this case, possessed weapons and there was some indication of a propensity to use those weapons. In
United States v. Garcia Mendez,
In the present case, when the officers approached Kane’s house, they had learned that there were three men and a woman inside (in addition to the informant), and that the inhabitants had available to them in the house two rifles, a shotgun, and a revolver. 9 There was also overwhelming evidence that the inhabitants were engaged in the production and sale of large quantities of illegal drugs, for which, it reasonably could have been deduced, the weapons were necessary as protection. It is possible that a substantial arms supply unexplained by legitimate purposes would itself have established reasonable grounds for the officers actions in this case. In the context of large scale drug activities, we hold that the standard was met.
This case is distinguishable from those instances where the courts have refused to sanction an intrusion under this exception. In
Sabbath v. United States,
IV.
For the reasons discussed above, we will affirm the decision of the district court not to suppress the evidence seized in the raid and therefore uphold the guilty plea conditionally entered by the appellant.
Notes
. The testimony at the suppression hearing does not specifically establish the ultimate source of this information, though it is probable that it was the informant Weston. Agent Wicks testified at the hearing that immediately before the search, he learned from Agent Miller of a telephone call Miller had received from Weston describing the production of methamphetamine in the house. According to Wicks, Miller also told him in that conversation about the number of people and weapons in the house. Transcript of January 14, 1980 Hearing, pp. 5-9.
. In his dissent, Justice Brennan considered these exceptions as exclusive. The majority in Sabbath made no such limitation.
.
See, e. g., United States v. Fluker,
.
See, e. g., United States
v.
Seelig,
.
See, e. g., United States v. Davis,
. In
Sabbath v. United States,
the Supreme Court held that it did not have to decide whether exigent circumstances would justify noncompliance with the statute because there was no reason to believe announcement would have placed the police in any danger.
.
See United States v. Fluker,
. The government does not claim that the second unit broke into the house before Agent Wicks entered the dwelling through the open door. Therefore no argument can be made that the intrusion was secured through consent or ruse.
. The record does not reflect whether the inhabitants had licenses for any of these weapons.
