A loud explosion that shook the Chelsea neighborhood of Manhattan Saturday night was "an intentional act" that injured 29 people, according to New York authorities.
29 Injured in New York Blast
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Crime scene investigators work at the scene of Saturday's explosion in Manhattan's Chelsea neighborhood, in New York, Sept. 18, 2016.
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A view of a mangled construction toolbox at the site of an explosion in the Chelsea neighborhood of New York, Sept. 18, 2016.
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Members of the FBI and other law enforcement officers carry on investigations at the scene of Saturday's explosion in New York, Sept. 18, 2016.
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A New York City Police Department (NYPD) truck tows a spherical chamber carrying a second explosive device from near the site of an explosion in the Chelsea neighborhood of Manhattan, New York, Sept. 18, 2016.