The explosion went off at about 8:30 p.m. on West 23rd between 6th and 7th avenues.
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The video shows the blast and then the aftermath with people running away. Click on the video player above to watch.
The explosion was felt and heard for many blocks.
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Another video that claims to be "leaked video" is making rounds on social media. It shows a wider shot outside:
Explosion captured on surveillance video
Click here for the latest on the explosion in Manhattan.