The NY police twitted that a possible second explosive device was found in the Chelsea neigborhood in Manhattan, which was hit by a major blast hours ago, injuring some 29 people.

The suspected explosive device was found on Saturday in New York City near the site of a blast in the Chelsea neighborhood, Harry J. Wedin, chief of the New York Police Department’s Special Operations Division, said in a message on Twitter. The police warned people to avoid the area of explosion.

The police has reportedly cordoned off the territory around the area where the second suspected bomb has been discovered.

Fox News reported that the second explosive device is made of a pressure cooker. A source told CNN that the device had wires attached and appeared to be connected to a cell phone.

New York Mayor Bill de Blasio said to reporters that the blast was intentional. However, he noted that it’s early to talk about the connection between the New York blast and that that occurred earlier on Saturday in New Jersey.

“There is no specific and credible threat against New York city at this point in time from any terror organization,”  he underscored.

The explosion occurred at 8:30 PM at 135 23rd St. in downtown Manhattan between 6th and 7th avenue.

The blast caused 29 injuries with none of them life threatening, the city’s Fire Commissioner Daniel Nigro said at a press conference. The Russian consulate general in the US reported that no Russian citizens were injured in the explosion.