Two devices thrown outside New York City Mayor Zohran Mamdani’s residence Saturday contained explosive materials and fragmentation that could have killed and maimed numerous people, the FBI confirmed late Sunday. A federal terrorism investigation is underway and terrorism charges are pending.

Two people from Pennsylvania were arrested outside Gracie Mansion Saturday afternoon after a suspicious device was ignited. It is the home of Mamdani and his wife.

New York City Police Commissioner Jessica Tisch told reporters on Saturday that an anti-Islam protest was organized by people associated with Jake Lang, a pardoned Jan. 6 rioter and far-right influencer. A group of counter-protesters, numbering more than 100, also gathered, and two young men from Pennsylvania, angered by the anti-Islam protest, brought the homemade bombs to the gathering, intending to cause harm, law enforcement sources told CBS News.

Read the rest of the story at CBS News.