An investigation into New York City’s (NYC) alleged “ISIS-inspired” terrorist attack reportedly resulted in a controlled detonation of additional explosive devices discovered in a storage facility.
Although neither of the improvised explosive devices (IEDs) thrown at a rally in NYC detonated during the attack, additional devices were discovered by officials at a storage unit in the suspects’ hometown Monday night, a federal source told Fox News. (RELATED: Zohran Mamdani Cries Islamophobia After Alleged ‘ISIS-Inspired’ Attack — Then Tries Cleaning Up Next Day)
The rally was organized by right-wing demonstrators, but officials stated that Islamic counter-protesters were responsible for the attack.
The FBI is conducting a court authorized search of a storage unit in Pennsylvania related to the investigation into the incident near Gracie Mansion. The FBI New York Joint Terrorism Task Force, along with our partners at the NYPD, will continue pursuing all leads and tips. If…
— FBI New York (@NewYorkFBI) March 10, 2026
The investigation led the Federal Bureau of Investigation (FBI) to Bucks County, Pennsylvania, where suspects 18-year-old Emir Balat and 19-year-old Ibrahim Kayumi reportedly reside.
Balat had been enrolled in online courses with the local high school during the time of the attack, according to CBS News, citing a spokesperson for the school.
Balat and Kayumi were charged by the Southern District of New York with attempting to support ISIS, using a weapon of mass destruction and transporting explosive material, the outlet reported.
Investigators said that if the bombs had gone off in the city, it could have been “catastrophic,” Fox News reported.
The outlet shared a video from outside the storage unit in which a loud explosion can be heard during the controlled detonation.
New York Police Commissioner Jessica Tisch said the explosives were a legitimate threat, with the devices containing triacetone triperoxide (TATP) — a volatile homemade explosive commonly called the “mother of Satan.”
“These were not hoax devices, nor smoke bombs,” Tisch said during a Monday press conference. “They were improvised explosive devices that could have caused serious injury or death.”
Deputy Attorney General Todd Blanche said in a press release that Balat and Kayumi allegedly aimed to create an explosion deadlier than the 2013 Boston Marathon bombing, which resulted in the deaths of three people.
“These men allegedly sought to inflict mass casualties in service to ISIS with the hope of exceeding the carnage of the Boston Marathon bombing,” the press release said Monday.
Both suspects are U.S. citizens. Their parents are naturalized U.S. citizens, with one pair from Turkey and the other from Afghanistan, according to Fox News.
The Daily Caller reached out to the FBI but has not heard back as of publication.