BOULDER, Colo. -- A Boulder auto mechanic was crushed to death Thursday when he was caught beneath a vehicle on a service bay lift.

Officials said Gabrial Slagle, 23, was working at McCaddon Cadillac under a raised lift when a co-worker lowered the lift, killing Slagle. Investigators said the co-worker did not know that Slagle was under the lift when he lowered it.

Slagle was rushed to a Boulder hospital, but was pronounced dead on arrival. The coroner said he died from blunt force injuries to the head.

The Occupational Safety and Health Administration will investigate the accidental death.