• John F. Kennedy High School

John F. Kennedy High School (Photo : Reuters)

Three workers were injured after a gas line exploded at the John F. Kennedy High School in the Marble Hill section of Manhattan on Aug. 20. The explosion happened while construction workers are on duty damaging three floors of the building.

Seven people were on duty when the explosion happened. Three were injured while one is in critical condition. The workers were working on a project in the science laboratory room located on the sixth floor when the explosion happened.

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Police investigation claim that the workers were draining the gas coming from the main line in the lab. However, they did not completely drain the gas which set off the explosion.

The explosion was massive that it blew out windows on the sixth floor while at the same time shocking adjacent buildings. The explosion managed to severely damage the fourth, fifth and sixth floor of the building.

New York City fire commissioner Daniel A. Nigro told The New York Times, "This building has been seriously damaged although the structural damage is very little. It's something to do with the gas lines in the building, we do know that, but what caused the explosion, we do not know that."

Mr. Nigro added that the workers present during the explosion did not report smelling gas before the explosion happened.

Despite tracing the cause of the explosion to a leaking gas main, the authorities said that no fire broke out.

Three were injured during the explosion and one is in critical condition. The other two are in serious condition but not life threatening, according to NDTV.