DEVENS — Five construction workers at the Bristol-Myers Squibb site were injured in a 20-foot fall that brought four ambulances from Devens and the surrounding towns and a Life Flight helicopter to Rogers Field.

First responders were summoned to the Queenstown Street site Oct. 12 by a 911 telephone message at 11:39 a.m.

Four workers were transported to Nashoba Valley Medical Center by ambulance, said Devens fire Chief and Safety Officer Thomas Garrity, and one was taken by medical helicopter to Beth Israel Hospital. He said they had suffered a fall. An unsubstantiated report indicated a wall had collapsed.

A worker outside a gate to the private property indicated one of the injuries had been to the shoulder of one of the workers. The press was denied access, and the gate was quickly shut.

No further information was available from fire officials or MassDevelopment. A Bristol-Myers Squibb representative authorized to speak about the matter was attending day-long meetings and was unavailable as of press time. — Don Eriksson