The FBI revealed on Monday that federal agents were searching a Pennsylvania storage facility in connection with their investigation into the ISIS-inspired botched bombing outside Gracie Mansion.

The feds were “conducting a court authorized search” of the storage facility in Langhorne, the same borough where Emir Balat — one of the alleged bomb hurlers — lived with his parents.

Law enforcement vehicles outside Public Storage in Langhorne, Pa., on March 9, 2026, in connection to the probe into the botched ISIS-inspired Gracie Mansion bombing in New York City. Kyle Mazza/Shutterstock Investigators remained at the storage facility through the night. Kyle Mazza/Shutterstock Kyle Mazza/Shutterstock

“The FBI New York Joint Terrorism Task Force, along with our partners at the NYPD, will continue pursuing all leads and tips,” the FBI’s New York office said in a Monday night X post announcing the search.

Investigators reportedly found more homemade explosive devices inside the storage facility and the FBI’s bomb squad is believed to have set off three IEDS in a controlled detonation after dark, cops at the scene told The Post.

Balat, 18, and Ibrahim Kayumi, 19, allegedly plotted to launch a deadly attack Saturday during an anti-Muslim protest outside Mayor Zohran Mamdani’s Upper East Side residence.

The duo allegedly tried to detonate IEDs outside Gracie Mansion, but the devices never exploded.

Emir Balat, 18, and Ibrahim Kayumi, 19, have been charged with hurling an IED at a violent protest outside Gracie Mansion, where Mayor Zohran Mamdani lives with his wife. AFP via Getty Images

Balat and Kayumi were arrested by the NYPD moments after the 18-year-old allegedly tossed one of the explosives at a crowd and dropped another bomb near a group of cops. 

A five-count complaint against the wannabe terrorists from upscale Philadelphia suburbs revealed on Monday they wanted to cause more deaths than the Boston Marathon bombing.

“It was only three deaths,” Balat said of the Boston bombing, indicating that he was hoping for something “even bigger” in New York, according to investigators.

Balat tries to flee after throwing a homemade explosive device during an anti-Muslim protest on Saturday. AFP via Getty Images

They also allegedly pledged allegiance to ISIS after their arrests, according to the feds.

“All praise is due to Allah lord of all worlds,” Balat allegedly wrote after asking for a pen and paper at an NYPD stationhouse. “I pledge my allegience [sic] to the Islamic State. Die in your rage yu [sic] kuffar.”

NYPD Commissioner Jessica Tisch noted that “‘Now die in your rage’ is a commonly known ISIS slogan,” and Kuffar is Arabic for infidel or non-believer.

“These statements, as set forth in the complaint made clear that this was not random violence. This was a planned attack motivated by extremist ideology and inspired by a violent foreign terrorist organization,” Tisch said.