This cellphone photo taken on Sept. 17, 2016 shows the police blocking a road after an explosion in New York, the United States. (Photo: Xinhua/Li Muzi)
New York Police sources said they will not rule out the possibility of a terror attack in an explosion in the Chelsea neighborhood of Manhattan on Saturday evening, in which a total of 25 people have been injured.
Up to now, the cause of the blast is under investigation, the New York City Fire Department said.
Police said an initial probe suggested the explosion occurred in a dumpster but the cause was still undetermined.
Law enforcement sources believed an improvised explosive device caused the explosion.
White House said President Obama has been briefed about New York blast, the cause of the explosion is still unknown.
Local media reported that New York City Mayor Bill De Blasio is rushing to the explosion scene.
Police issued a bulletin advising motorists in the area that they should "expect extensive traffic delays and emergency personnel in the area of 23rd Street and 7th Avenue" and ask the public to avoid entering the area.
New York city mayor, fire and police will hold a press conference at midnight. (Updated)
