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.

A possible secondary device has been located @ 27th Street, 6th — 7th Avenues. #NYPD nvestigations are ongoing. Avoid the area @NYPD13Pct — NYPD Special Ops (@NYPDSpecialops) 18 сентября 2016 г.

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

Police officers closing 28th & 6th Avenue off because of confirmed second device pic.twitter.com/gkHAlalESd — Sandra E. Garcia (@S_Evangelina) 18 сентября 2016 г.

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​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.

BREAKING PHOTO! Here is the second device found by a NYSP Sgt. At 27 street and 7 Ave. investigation is ongoing pic.twitter.com/x7o9Rr30I3 — New York City Alerts (@NYCityAlerts) 18 сентября 2016 г.

​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 robot is now moving across 27th St now back toward the police unit on 7th Av #Chelsea #ChelseaExplosion pic.twitter.com/nc1Z9Uw07W — KarlaZabs (@karlazabs) 18 сентября 2016 г. ​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.