New York City was thrown into turmoil tonight as a tense protest in Midtown erupted into panic when a man allegedly set off a smoke device in the middle of a marching crowd, sending demonstrators and commuters scrambling for cover before NYPD officers tackled and arrested him.

The incident unfolded near Times Square just after 7:30 p.m., as thousands packed the streets in a fresh wave of demonstrations over policing, war and soaring living costs. Witnesses say a thick cloud of coloured smoke billowed from a canister tossed toward a police line, triggering screams and a stampede toward side streets and subway entrances.

Cellphone video shows officers in tactical gear surging through the haze, wrestling a man in a hoodie to the ground as bystanders shout and jostle for space. The suspect was dragged away in cuffs while bomb‑squad technicians and K‑9 units swept the area; authorities later confirmed the device was a commercial‑grade smoke bomb, not an explosive, but said the act will be treated as a “serious threat to public safety.”

Traffic ground to a halt across much of Midtown as police kettled parts of the crowd, helicopters circled overhead and emergency vehicles clogged major avenues. Protest organisers accuse the NYPD of overreacting and using the scare as a pretext to break up what they insist was a mostly peaceful march; city officials counter that the smoke attack turned a volatile situation into “total chaos” in seconds.

As New Yorkers pick their way past discarded signs, smashed windows and lingering smoke, one thing is clear: a city long accustomed to protest has just had a brutal reminder of how quickly the line between demonstration and disaster can vanish.