Baltimore firefighters are working to free a man trapped after the trench he was working in collapsed.

The collapse occurred around 10:40 a.m. Monday in the 4100 block of Fairfax Avenue.

Fire department spokesman Chief Kevin Cartwright said contractors used a backhoe to dig a trench for a sewer line repair. He says the man was digging with a shovel in the 10-foot deep trench when the side wall came down on top of him.

Cartwright says the man is covered by earth nearly up to his chest and crews are shoring up the walls to avoid another collapse.

He says the man is awake, a medic unit is on the scene and a team at Shock Trauma is on standby.