JUST IN: NYC Bombers ‘Trained’ By ISIS, Had ‘Mother Of Satan’ IEDs

Two ISIS-trained extremists have been charged after allegedly hurling an improvised explosive device toward Gracie Mansion during a chaotic weekend protest — a homemade bomb authorities say was packed with the notorious terrorist explosive known as the “Mother of Satan.”

Ibraham Kayumi, 19, and Emir Balat, 18, were arrested Saturday after the violent clash outside the mayor’s residence. Law enforcement sources close to the case told The Post that both men had radicalized in recent years and traveled abroad to locations tied to terrorist training networks.

Balat spent more than three months in Istanbul last year, according to the sources. Kayumi traveled to Istanbul and Saudi Arabia in 2024 and previously visited Melbourne, Australia, in 2019.

Investigators said the pair admitted to police that they had watched ISIS propaganda videos and threw the explosive at right-wing demonstrators after claiming the group had insulted their religion.

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The device itself was built from sports drink bottles filled with triacetone triperoxide, or TATP — a notoriously unstable explosive frequently used in terrorist attacks and nicknamed the “Mother of Satan.” Officials said the substance is so volatile it often detonates without the need for a fuse.

Authorities noted that the compound can be assembled using common household ingredients found at pharmacies or home improvement stores, making it cheap and relatively easy to produce.

“It’s designed to maim and kill,” one source told The Post. “This is just luck no one is dead.”

Similar TATP explosives have been used in deadly terror attacks in France, the United Kingdom, Belgium and New Delhi over the past decade.

The device, however, failed to detonate during Saturday’s confrontation between demonstrators backing right-wing activist Jake Lang and pro-Muslim counterprotesters.

The protest outside Gracie Mansion had been organized by Lang as an anti-Muslim rally. Counterprotesters quickly arrived, and the demonstration devolved into multiple fights captured on video.

Police said six people were arrested during the clashes, including Kayumi and Balat.

Another protester aligned with Lang’s group, Ian McGinnis, was accused of pepper-spraying counterprotesters. He was charged with assault, reckless endangerment and unlawful possession of noxious matter, according to law enforcement sources.

During one of the confrontations, police said a sports drink bottle filled with TATP and wrapped in construction tape was thrown toward Lang’s group.

Officers quickly secured the device and prevented it from detonating.

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On Sunday, NYPD Commissioner Jessica Tisch pushed back against earlier claims that the object was harmless, warning that it posed a serious threat.

“The NYPD Bomb Squad has conducted a preliminary analysis of a device that was ignited at a protest yesterday and has determined that it is not a hoax device or smoke bomb,” Tisch wrote on X.

“It is, in fact, an improvised explosive device that could have caused serious injury or death,” she said. “I want to again thank the brave members of the NYPD, who ran towards danger without hesitation and quickly apprehended the suspects.”

Mayor Zohran Mamdani also addressed the incident on Sunday, condemning Lang as a “white supremacist” while criticizing the violence that erupted at the protest.

Mamdani said “hate has no place in New York City,” but did not reference that the alleged bomb throwers were part of the pro-Muslim counterprotest group.

“What followed was even more disturbing,” the mayor said. “Violence at a protest is never acceptable. The attempt to use an explosive device and hurt others is not only criminal, it is reprehensible and the antithesis of who we are.”

The investigation has now expanded to federal authorities. The NYPD and the FBI executed search warrants Sunday at homes in Pennsylvania connected to Kayumi and Balat, sources said.

Bomb squad officers also returned to the scene Sunday afternoon after a bottle wrapped in tape was spotted inside a Hyundai linked to one of the suspects. Authorities cleared the vehicle without incident.

Both men are expected to be turned over to federal custody, and the device will undergo further testing at FBI headquarters in Quantico, Virginia, according to sources.

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