The five-and-a-half-minute video starts with horrific scenes from the recent Paris attacks and shows French-and Arabic-speaking militants praising the Friday assault that left at least 129 people dead, media reports said. At the end of the video a suicide bomber is shown making
an explosive vest, putting it on and zipping up his jacket.

The next image is of a crowded Times Square, Herald Square and two midtown Manhattan crossroads in New York. The militant is seen holding a trigger and the video suddenly goes blank, reports said.

In a statement, the New York Police Department said it was aware of the video and was deploying additional members of its new anti-terrorism squad out of an abundance of caution. It said some of the footage is old but the video reaffirms the message that New York City remains a top terrorist target.

"While there is no current or specific threat to the city at this time, we will remain at a heightened state of vigilance and will continue to work with the FBI, the Joint Terrorism Task Force and the entire intelligence community to keep the city of New York safe," the statement added.

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