Two Pennsylvania men, Emir Balat, 18, and Ibrahim Kayumi, 19, were arrested after explosive devices were ignited outside New York City Mayor Zohran Mamdani’s residence during a protest and counterprotest.

The FBI has launched a federal terrorism investigation into the incident.

Balat allegedly lit and threw an improvised explosive device (IED) toward counterprotesters, while a second device, obtained from Kayumi, was also ignited and dropped nearby.

The devices, described as jar-shaped IEDs with nuts, bolts, screws, and hobby fuses, could have caused serious injury or death, CBS News has reported.

The protest involved an anti-Islam group linked to far-right influencer Jake Lang, while the counterprotest opposed hate and extremism.