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Firefighters are battling a fire at Connecticut-based plant Kleen Energy Systems. This is the same plant that had a massive explosion in 2010 and killed six people and injured dozens.
Middleton officials say that the fire apparently ignited when oil from the turbine leaked during a malfunction. The fire was confined to one of the plant's two turbines. The turbines were encased in cement, making it difficult to fight the fire.
The 2010 explosions occured when crews building the plant used natural gas at high pressures to clean out the pipes. A spark ignited the natural gas. This incident prompted the ban of "gas blowing" in Connecticut.