http://www.nytimes.com/2016/09/19/nyregion/chelsea-explosion-what-we-know-and-dont-know.html 2016-09-18 12:39:03 Chelsea Explosion: What We Know and Don’t Know At least 29 people were injured in an explosion in a Manhattan neighborhood in what Mayor Bill de Blasio called “an intentional act.” === A Mayor Bill de Blasio held a news conference Here is the latest: The police commissioner, James P. O’Neill, said it happened in front of 131 West 23rd Street around 8:30 p.m. Witnesses said the explosion seemed to have come from a Dumpster on a sidewalk. Officials said they believed the explosion had been caused by a homemade bomb. It was found on West 27th Street between the Avenue of Americas and Seventh Avenue almost three hours after the explosion. The authorities described it as a pressure-cooker device like the one used in the A The Police Department bomb squad removed the device around 2:25 a.m. to the department’s firing range at Rodman’s Neck in the Bronx, where it will be inspected by robots. Many of the injuries were caused by shrapnel from the explosion. The injuries were not life-threatening, though one person was seriously hurt, officials said. The mayor called the explosion “an intentional act” but said at a news conference late on Saturday night that there was no known connection to terrorism. He added that there was “no specific and credible threat against New York City at this point in time from any terror organization.” The police commissioner said at the news conference that no suspect was in custody. “We are still in the process of trying to figure that out,” he said. Mr. O’Neill said the authorities had collected video of the explosion but asked the public for any footage it might have, as well as eyewitness accounts and tips. The Police Department issued an advisory around 1 a.m. on Sunday that 14th Street to 32nd Street was closed eastbound and westbound to vehicular traffic between Fifth and Eighth Avenues. The closure, which was related to the search for other devices, evidence and surveillance video, was in effect until further notice, the department said. Officials said the New York explosion was not tied to a blast that happened 11 hours before when That device went off around 9:30 a.m. There were no injuries. • Who was responsible for the explosion. • What was inside the pressure cooker. • Why the site of the explosion was selected. • A motive behind the explosion.