From NPR.

Officials in New York City are offering new details about what they’re describing as an attempted bomb attack during a protest over the weekend. No one was injured. The incident is being investigated as a possible terror attack.

Anti-Muslim protesters led by a far-right activist gathered outside Mayor Zohran Mamdani’s residence Saturday — Mamdani is the city’s first Muslim mayor. Two counterprotesters from Pennsylvania then allegedly threw explosive devices into the crowd. At a press conference, NYPD commissioner Jessica Tisch said the devices were made with an explosive chemical widely used by international bomb-makers. A third device was defused nearby.

An investigation led by the FBI is now underway in New York and Pennsylvania. Mamdani condemned the attempted attack and praised police who responded.