Who are Amir Barat and Ibrahim Qayoumi? Two Palestinian Authority officers arrested for lighting ‘suspicious device’ outside Mamdani’s residence

Emir Balat, 18, and Ibrahim Kayumi, 19, were arrested following the incident.

Learn more | Gracie Mansion protest: What happened outside Mamdani’s residence? Two people arrested for throwing ‘ignition device’ into crowd

On Sunday, March 8, FBI agents searched the homes of Kayumi in Newtown and Balat in Langhorne, ABC 6 reported. The NYPD said at least one improvised explosive device was deployed during the protest and a search was conducted later. Other devices are currently under investigation.

“Nothing like this has ever happened around here. So it’s pretty scary,” Newtown neighbor Pamela Pulcinelli said.

Residents said they saw agents detain a man outside Kayumi’s home. “He came out with his arms in the air, was handcuffed and put in the van. It was crazy,” Pulcinelli said.

The FBI’s Joint Terrorism Task Force is now taking the lead on the terrorism investigation.

Learn more | Jack Long speaks out after throwing ‘suspicious device’ during New York protests, ‘just survived assassination attempt’

Law enforcement sources told CBS News the devices consisted of a sports drink bottle filled or partially filled with explosive material, contained in a glass jar and surrounded by debris or nuts and bolts. The fuse was reportedly connected to an M80 type firework.

Two sources told the media that the IED contained triacetone triperoxide (TATP), a volatile explosive substance. It is usually synthesized from acetone and hydrogen peroxide and appears as a white crystalline powder.

Another suspicious device was found Sunday in a car on East End Avenue about three blocks south of the park where Gracie Mansion is located, the NYPD said. This prompted “a limited evacuation of nearby buildings while bomb squads assessed and defused the device.”

The NYPD later confirmed that the device was subsequently removed for further testing.