MANHATTAN, N.Y. -

New York City Mayor Bill de Blasio says there is no reason to think that an explosion in Manhattan's Chelsea neighborhood had a terrorist connection, but he did call the blast an "intentional act."

The mayor also said there is no specific connection to a pipe bomb explosion in the New Jersey shore town of Seaside Park earlier Saturday at a charity run. There were no injuries in that incident.

Fire Commissioner Daniel Nigro says a total of 29 people were injured in the Chelsea blast. He says one person's injuries were serious and the rest were minor.

Police Commissioner James O'Neill says officers are investigating a possible second explosive device a few blocks away from the explosion at about 8:30 p.m. on West 23rd Street.

A law enforcement official tells The Associated Press that an explosion in Manhattan's Chelsea neighborhood appears to have come from a construction toolbox in front of a building.

The official spoke on condition of anonymity because the person wasn't authorized to speak about an ongoing investigation.

Police say 26 people have sustained minor injuries in the explosion on West 23rd Street.


The blast happened in front of a residence for the blind. Witnesses say the explosion at about 8:30 p.m. blew out the windows of businesses in the area.