The defendants, Dupont and Hinson, appealing under G. L. c. 278, §§ 33A-33G, were jointly tried and convicted of an armed robbery of the Iandoli Market in Milford in the early evening of July 3, 1971. The principal evidence introduced by the Common-wealfh consisted of the proceeds of the robbery, which were found and seized minutes after the robbery in a car which was owned and was being driven by Hinson and in which Dupont was a passenger, and of in-court and out-of-court identifications of Hinson by a clerk of the Iandoli Market. The defendants assign as error (1) the denial of their motions to suppress the evidence seized from the car; (2) the introduction of the identification testimony; and (3) matters arising out of an incident which occurred in the course of the trial during a recess whereby certain jurors inadvertently saw the defendants in a cellblock. In addition, the defendant Dupont assigns as error the denial of his motion for a directed verdict.
1. At the voir dire on the motion to suppress the evidence seized from the car testimony was adduced to the effect that, prior to the evening of the Iandoli Market robbery, the defendants were under suspicion by both State and Milford police of having participated in another Milford robbery. Writings to that effect had been posted at the Milford police station, and a Milford officer, Vincent Liberto, had been assigned to “stake out” a 1966 Pontiac, license number 45223K, known to be registered to the defendant Hinson. On April 21, 1971, Officer Liberto observed that vehicle pull into the parking lot of the Iandoli Market, stop there for a brief period, and then move to another parking lot directly *568 across the street from Iandoli’s, where it stopped for a short while before departing. Officer Liberto later learned from other officers that, upon leaving Milford, the vehicle had proceeded north along Route 495.
On July 3, 1971, at around 6:30 p.m., Officer Liberto received a radio dispatch informing him that an armed robbery had just taken place at the Iandoli Market. Liberto was directed to be on the lookout for a 1962 Chevrolet. Some three to five minutes later, a second radio dispatch advised him that the 1962 Chevrolet had been found abandoned. Liberto then proceeded to an entrance ramp along Route 495 and began looking for the 1966 Pontiac registered to Hinson. At approximately 6:50 p.m. it drove into view, moving north on Route 495 at a slower rate of speed than the other cars. Hinson was driving with Dupont seated beside him. As they passed him, Liberto observed both men turn their heads away from him, and as he pulled out to follow them, they increased their speed from thirty to thirty-five miles per hour to sixty to sixty-five miles per hour. Liberto turned on his siren and beacon light, observing Dupont bend down on two occasions and turn twice to look back at the cruiser. After motioning the car to pull over, Liberto observed both men bend down as he approached the car. He instructed them to keep their hands visible and asked for Hinson’s license and registration. Liberto, seeing a knife handle and part of a blade showing on the floor board of the driver’s side of the car, took possession of the knife, and placed the defendants under arrest for “possession of a dangerous weapon and suspicion of armed robbery.”
Liberto then conducted a general search of the car. Hidden in a well behind the right headlight assembly he found a pillow case which contained brown money bags, a green money bag with Iandoli written across it, and loose currency. The defendants moved to suppress these items, but the trial judge found that probable cause existed for the arrests and search, and therefore ruled the *569 search reasonable and permitted the items to be introduced in evidence.
Although traditional Fourth Amendment requirements, including the necessity of a search warrant, have been held to apply to automobile searches
(Preston
v.
United States,
The critical question is whether Officer Liberto had probable cause to search the vehicle, in other words, whether he had “ ‘reasonable or probable cause’ to believe . . . [he would] find the instrumentality of a crime or evidence pertaining to a crime before [he began his] warrantless search.”
Dyke
v.
Taylor Implement Mfg. Co.,
2. The second assignment of error before us is the introduction in evidence of the pre-trial and in-court identifications of the defendant Hinson by John O’Con-nor, a grocery clerk at the Iandoli Market. On the night after the robbery, the police showed Hinson’s driver’s license to O’Connor without indicating how it had been obtained and asked him if he recognized the picture. O’Connor identified it as that of the driver of the getaway car at the robbery. He also identified Hinson at the trial. Hinson argues that the showing of his driver’s license to O’Connor was unnecessarily suggestive, and that it tainted as well the subsequent identification at trial.
We do not consider the argument. There was no motion made to suppress the identification under former Rule 101B of the Superior Court, as amended (now Rule 61 of the Superior Court [1974]). Even more decisive is the defendant’s failure to take any exception either to the testimony as to the out-of-court identification or to the in-court identification. An assignment of error which is not based on an exception brings nothing before us for review.
Commonwealth
v.
McDonald,
3. The defendants’ next assignment of error concerns an inadvertent viewing of the defendants in a cellblock by at least some of the jury when an elevator on which *572 the jurors were riding stopped briefly at the wrong floor. The incident was not brought to the attention of the court until after the verdict was received and the jury were discharged. The defendant Dupont stated (through counsel) that he had heard one of the jurors exclaim, “Oh, my God!”
The defendants, conceding that the judge had no opportunity to give curative instructions, argue that the jurors should have been examined to inquire into possible prejudice (although they made no suggestion to that effect at the time), and that absent such an examination their motions for a mistrial should have been granted. The only authority the defendants cite respecting the polling of the jury is
Commonwealth
v.
Crehan,
On the day after the trial had ended, the trial judge examined two court officers who had been present during the incident. The court officers told the judge that none of the jurors had commented on it. The defendants contend that this examination by the judge, in the absence of the defendants or their counsel, violated their rights of confrontation and to counsel. We find this claim to be without merit. In contrast to
Commonwealth
v.
Robi-chaud,
4. The defendant Dupont also assigns as error the denial of his motion for a directed verdict, contending that the evidence linking him to the robbery was insufficient to warrant its submission to the jury. The evidence against Dupont was largely circumstantial in nature, and proof of the crucial facts necessarily depended on inferences which the jury might draw from the circumstances.
Commonwealth
v.
Bonomi,
335
*574
Mass. 327. 355-356 (1957). “When a material fact is not proved by direct testimony, but is left to be inferred from the facts directly sworn to, the inference need not be a necessary one. There is a case for the jury, unless the inference either is forbidden by some special rule of law, or is declared unwarranted because too remote, according to the ordinary course of events. If there is a case for the jury, they are at liberty to use their general knowledge in determining what inferences are established beyond a reasonable doubt; and the facts inferred by them are as properly proved as if directly testified to.”
Commonwealth
v.
Doherty,
The jury could reasonably have inferred from Dupont’s presence in the getaway car approximately twenty minutes after a robbery that had been executed by Hinson and at least three unidentified robbers, that Dupont was himself one of the three other robbers. Far from being impermissibly remote, such an inference seems rather compelling. See
Commonwealth
v.
Medeiros,
Commonwealth
v.
Murphy,
Judgments affirmed.
Notes
Although we consider probable cause to search, rather than (as did the trial judge in the instant case) probable cause to arrest, the
*570
standards are the same.
Whiteley
v.
Warden,
