East Hampton Town police are investigating an industrial accident involving a man who was seriously injured and airlifted to Stony Brook University Hospital, police said.

The accident occurred Friday at 10:28 a.m. at Riverhead Building Supply's storage supply yard, 1 Cove Hollow Rd., East Hampton, police said.

A customer was injured by falling Sheetrock, which was stacked in the warehouse, said John Callahan, company president. The customer was accompanied by an employee, who was not injured, Callahan said.

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The company is cooperating with the police investigation, he said.

Further information was not immediately available.