The FBI said it also conducted a controlled detonation of material found in the Pennsylvania storage unit because of safety concerns.

The FBI said Tuesday that it found “explosive residue” in a Pennsylvania storage unit believed to be connected to an “ISIS-inspired terrorism” incident near New York Mayor Zohran Mamdani’s residence over the weekend.

The FBI said on X that it found the explosives and that authorities “conducted a controlled detonation.” The explosives are “believed to be connected” to Saturday’s incident, in which improvised explosive devices were thrown outside Gracie Mansion during protests.

Two Pennsylvania teenagers — Ibrahim Kayumi, 19, and Emir Balat, 18 — face federal charges in connection with the incident. Federal prosecutors said the pair hoped to inflict more carnage than the Boston Marathon bombing, which killed three people and injured more than 260 others in 2013.