BP plc said Tuesday it was investigating the cause of an explosion Monday morning at its Pinon natural gas compressor station in western Colorado. One worker was killed and two others were injured.

The station, which has a capacity of 30 MMcf/d, is near Bayfield, CO, and is part of gathering infrastructure that serves the company’s San Juan Basin production. The station remains shut down, and BP said it did not know when it would restart.

According to the company, the incident occurred during pipeline maintenance at the station. The Durango Herald reported that La Plata County Sheriff spokesman Dan Bender said the explosion was not caused by flammable material but rather was caused by a pressurized device. “There was pressure being put into a device, and that device failed,” he told the paper.

BP said it had launched an investigation of its own and was cooperating with area officials on their investigation.

“We are deeply saddened that one individual was fatally injured in the accident,” the company said. “Two others are receiving medical treatment for injuries. The three individuals involved are contractors. We are working to ensure that all those affected by the accident are receiving support and counseling services.”

BP is the second-largest natural gas producer in Colorado, operating more than 1,200 wells, the company said. The operation is part of BP’s North America gas business, which has a presence in seven of the leading gas basins in the U.S. Lower 48. In 2011 BP produced more than 1,800 MMcf/d of gas in the United States.

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