Three more dive boats have joined the search for a contractor still missing after an explosion Friday on an oil rig off the coast of Louisiana. The U.S. Coast Guard called off its search, but the company that owns the rig, Houston-based Black Elk Energy Company, continued to look for the missing worker.

One worker has been confirmed dead after his body was found Saturday night and 11 were injured. Doctors said one of the injured was improving and in fair condition, and two were still in critical condition. All of the workers were from the Philippines, the Philippine Embassy in Washington has said.

The blast has been reported as caused by a worker mistakenly using a blowtorch to cut an oil line, rather than a saw. Grand Isle Shipyard, the company that employed the contractors, has said that’s inaccurate and that the cause of the explosion and fire was still unknown. Local, state and federal authorities are investigating the cause of the accident.

The drilling rig injury lawyers at Schechter, Shaffer & Harris, L.L.P., Accident & Injury Lawyers  represent offshore workers and families of offshore workers killed in accidents.