In this image taken from video, law enforcement officers respond to Manhattan's Upper East Side as New York City's police said they had identified a "suspicious device in a vehicle," Sunday, March 8, 2026, in New York. On Saturday, two men from Pennsylvania allegedly threw improvised explosive devices at anti-Muslim protesters. Joseph B. Frederick/AP hide caption

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Joseph B. Frederick/AP

New York City police commissioner Jessica Tisch said on Monday that an attempted bomb attack during a protest on Saturday outside Mayor Zohran Mamdani's official residence is being investigated by the NYPD and the FBI as "act of ISIS-inspired terrorism."

At a press conference, Tisch identified the suspects, who are both in custody, as Emir Balat, 18, and Ibrahim Kayumi, 19, both from Pennsylvania.

"These were not hoax devices nor smoke bombs.…