LOCKPORT, N.Y. (AP) — Two workers have been killed by 800-pound (363-kilogram) slabs of countertop material that fell on them while being unloaded from a trailer in New York.

The Niagara County Sheriff's office says it appears 11 slabs of Corian-brand material collapsed on the workers about 1:30 a.m. Monday at the XPO Logistics facility in Lockport, near Buffalo.

The men were pronounced dead at the scene. Their names weren't immediately released.

A spokeswoman says XPO Logistics, headquartered in Greenwich, Connecticut, is expected to comment later Monday.

Corian is a man-made solid material produced by DuPont.