The Commonwealth seeks further appellate review of a decision of the Appeals Court 1 reversing the defendant’s conviction and dismissing the indictment against him because of a violation of his statutory right *727 to a “prompt trial” under G. L. c. 277, § 72A. 2 We granted the Commonwealth’s application under G. L. c. 211A, § 11. We now reverse the judgment of the Superior Court, but we do so on a somewhat different analysis of the statute from that adopted by the Appeals Court.
The defendant was indicted for rape on March 3, 1971, and after a delay caused by his flight from Massachusetts, he pleaded not guilty on August 23, 1972. On November 21, 1972, he was sentenced to the Massachusetts Correctional Institution at Walpole on unrelated charges. On March 6, 1973, while in custody under that sentence, he filed a motion for speedy trial and, in the alternative, for dismissal of the indictment based on the Federal and State Constitutions and on G. L. c. 277, § 72A. 3 No further *728 entries appear on the docket until January, 1974, when the motion was set down for hearing. The hearing was held on February 6, 1974, and the motion was denied on April 11, 1974. The Commonwealth offered no explanation for the eleven months’ delay between the filing of the motion and the hearing. The defendant was tried and convicted of rape in November, 1974.
General Laws c. 277, § 72A, provides that a prisoner who applies for a “prompt trial... shall, within six months after such application is received by the court, be brought into court for trial or other disposition of any such indictment, information or complaint, unless the court shall otherwise order.” In this case and in
Commonwealth
v.
Gove,
We have recently discussed G. L. c. 277, § 72A, at some length in
Commonwealth
v.
Fields, supra
at 277-281 (1976), and no good purpose would be served by extensive repetition. The statute “should not be seen as a broad-gauge legislative attempt to help solve the problems underlying the concept of ‘speedy trial.’ The statute has a more re
*729
stricted application. It ‘establishes a priority for trials of defendants who are already in custody.’
Commonwealth
v.
Stewart,
In light of this limited purpose, we have previously stated that “General Laws c. 277, § 72A,
does not compel
a judge to dismiss an indictment if the case is not tried or otherwise disposed of within six months after an application for a speedy trial is ‘received by the court’ ” (emphasis supplied).
Commonwealth
v.
Fields, supra
at 280-281, quoting from
Commonwealth
v.
Loftis,
Where the defendant has neither caused the delay nor benefited from it, the statute does not inexorably render indictments ineffective after six months. Such a mechanistic approach is not required by the language of the statute and does not appear to have been contemplated by the Legislature. 4
*730 The salient fact in this case is the eleven-month period following the defendant’s motion for a prompt trial during which the Commonwealth apparently took no action whatsoever. The Commonwealth was simply unable to justify this long delay. Its first argument that the defendant’s 1971 flight from Massachusetts occasioned the delay in 1973-1974 is not responsive. Its second argument that the defendant suffered no prejudice from the delay, despite the defendant’s claim that three of his alibi witnesses had become unavailable neither justifies nor explains the absence of any action by the Commonwealth.
Where no adequate explanation is offered for the delay in this case, we need not discuss what factors might excuse delay beyond the statutory period in future cases.
5
Where “the delay or lack of any activity occurred in circumstances neither caused by nor attributable to the defendant,”
Commonwealth
v.
Fields, ante,
274, 281 (1976), the Commonwealth must at the very least, explain why such delay is “reasonably necessary and justifiable.”
Commonwealth
v.
Boyd,
We believe it appropriate to suggest at this point that the Commonwealth might have attempted to protect itself from the dismissal of the indictment in this case by the timely filing and prompt prosecution of a motion in the Superior Court seeking an extension of the statutory period fixed by G. L. c. 277, § 72A, stating in the motion or an affidavit incorporated therein, the reasons in support of the requested extension. In the Boyd case, supra at 179, we said: “[W]e emphasize again, as we did in the Loftis case [supra at 549], that the advisable procedure in cases arising under § 72A is that the judge specifically order an extension of the statutory périod, stating his reasons, where a delay is reasonably necessary and justifiable.”
Because our decision is based on G. L. c. 277, § 72A, we do not reach the defendant’s related but distinct claim of denial of his rights to a speedy trial under the United States Constitution and our Declaration of Rights. See Commonwealth v. Fields, ante, 274, 279-280 (1976). Nor need we address the defendant’s remaining claims of error.
The judgment of the Superior Court is reversed, the verdict is set aside, and an order is to be entered dismissing the indictment.
So ordered.
Notes
Commonwealth
v.
Alexander,
General Laws c. 277, § 72A, as appearing in St. 1965, c. 343, provides: “The commissioner of correction, the sheriff, master or keeper of a jail or house of correction, or in Suffolk county, the penal institutions commissioner of the city of Boston, shall, upon learning that an untried indictment, information or complaint is pending in any court in the commonwealth against any prisoner serving a term of imprisonment in any correctional institution, jail or house of correction, which is under his supervision or control, notify such prisoner in writing thereof, stating its contents, including the court in which it is pending, and that such prisoner has the right to apply, as hereinafter provided, to such court for prompt trial or other disposition thereof.
“Such application shall be in writing and given or sent by such prisoner to the commissioner of correction, or such sheriff, master, keeper or penal institutions commissioner, who shall promptly forward it to such court by certified mail, together with a certificate of said commissioner of correction, sheriff, master, keeper, or penal institutions commissioner, stating (a) the term of commitment under which such prisoner is being held, (6) the amount of time served, (c) the amount of time remaining to be served, (d) the amount of good time earned, (e) the time of parole eligibility of such prisoner, and (/) any decisions of the board of parole relating to such prisoner. Said commissioner of correction, sheriff, master, keeper, or penal institutions commissioner shall notify the appropriate district attorney by certified mail of such application to the court.
“Any such prisoner shall, within six months after such application is received by the court, be brought into court for trial or other disposition of any such indictment, information or complaint, unless the court shall otherwise order.”
In the circumstances of this case, where the district attorney received notice of the motion and where there was no showing that the defendant was notified of his right to apply under G. L. c. 277, § 72A,
*728
the Appeals Court correctly treated this motion as the legal equivalent of an application under G. L. c. 277, § 72A.
Commonwealth
v.
Alexander, supra
at 213-214. See
Commonwealth
v.
Boyd,
General Laws c. 277, § 72A, does not set forth the “consequence of a failure to comply with its provisions.”
Commonwealth
v.
Fields, ante,
274, 280 (1976), quoting from
Commonwealth
v.
Gove,
See
Commonwealth
v.
Boyd,
