Fire crews working 2-alarm fire at Kleen Energy Plant in Middletown

MIDDLETOWN -- Firefighters are at a fire at a  power plant that was the site of an explosion in 2010 that killed six workers.

The blaze at the Kleen Energy Plant in Middletown was reported just after 5 a.m. Tuesday.

Middletown Mayor Dan Drew said he spoke with South Fire District Chief Mike Howley who said the fire at the natural gas-fired plant was inside the wall in insulation and not near any of the gas lines.

Fire officials believe it started as an electrical fire.

There were no immediate reports of injuries.

The cause remains under investigation.

In 2010, an explosion occurred during construction of the plant in Middletown. Six people were killed. Authorities said crews were using natural gas at high pressure to clean out pipes and something sparked an explosion. The state later banned the “gas blow” practice.