New york,August21:A gas line blast rocked a Manhattan high school building during a construction work, injuring three people and severely damaging the multi-storey building at New york city at around 8 pm last night.
The thunderous explosion at the John F Kennedy High School in the Bronx neighbourhood ripped through the fourth, fifth and sixth floors of the building, blowing out windows and causing extensive damage,said sources.
The incident took place at around 8 pm during a construction work, injuring three contractors, one critically - who were working to fix up a science lab on the sixth floor.
The Mayor reached the scene of the explosion to assess the damage.
"Three individuals with burn injuries, all being treated at @hhcnyc's Jacobi Hospital. Thoughts and prayers with them and their families," de Blasio tweeted.
He said that details still emerging about the explosion and a full investigation is underway to find out the cause of the blast.
The schools in the city are currently closed and will open for the the new session in September.
At least three floors of the building were heavily damaged, officials told CBS2. Photos at the scene showed windows blown out and debris scattered in the vicinity of the building.
The Fire Department of New York said one of those injured was in critical condition, and the other two in serious, but non-life-threatening condition.
Emergency workers, police and crews from the energy company have rushed to the scene to bring rescue efforts.
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