BIDDEFORD (AP) – Firefighters say an explosion at a trash-to-energy incinerator in Biddeford blew panels off the building and started a fire.

Officials say the explosion at the Maine Energy Recovery Co. plant Tuesday afternoon was likely caused by a propane tank or some other pressurized object going through a trash shredder.

The blast blew two sets of panels off the building and ignited a small fire that was quickly brought under control. One worker suffered minor injuries.

Explosions occur periodically at the plant when propane tanks are mixed in with other waste.

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Information from: WMTW-TV, http://www.wmtw.com

AP-ES-11-05-08 0633EST