HOUSTON - A company official says a crane collapse at a southeast Houston refinery has killed four people and injured six others.

Fire Department Assistant Chief Omero Longoria says a crane several hundred feet long fell over at the LyondellBasell refinery at about 2 p.m.

Jim Roecker, LyondellBasell's vice president for refining, says those killed and injured were contract employees.

Longoria says five people were taken to area hospitals. He says two were in critical condition and three others were being treated for trauma-related injuries.

Roecker says about 1,500 contract workers are employed at the refinery.

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