Two Pennsylvania men charged with ISIS-inspired bomb attack outside NYC mayor's home

Two young men from suburban Pennsylvania drove to Manhattan on March 7, crossed the George Washington Bridge, parked their car, and minutes later threw live explosive devices into a crowd outside the New York City mayor's residence. One of those devices contained TATP, the volatile compound jihadist bomb-makers call the "Mother of Satan." Both men then told police exactly why they did it during an ongoing investigation that included a raid on a storage facility in Bucks County, Pennsylvania.

Their answer was ISIS.

Emir Balat, 18, and Ibrahim Kayumi, 19, both from Pennsylvania, are each charged with five counts, including attempted support to a designated foreign terrorist organization (ISIS), use of a weapon of mass destruction, and transportation of explosive materials. Federal prosecutors in the Southern District of New York unsealed the charges Monday. The FBI said later Monday that it was conducting "a court-authorized search of a storage unit in Pennsylvania related to the investigation into the incident near Gracie Mansion."

What Happened Outside Gracie Mansion

An anti-Islam protest with about 20 participants organized by people associated with Jake Lang arrived outside Mayor Zohran Mamdani's Upper East Side home at around 11 a.m. on Saturday. A counterprotest drew more than 100 participants to the area. Tensions started to escalate just after noon.

Balat and Kayumi arrived in New York City one hour before they were arrested, crossing the George Washington Bridge at 11:36 a.m. and parking at 12:05 p.m. They came prepared.

Witnesses reported seeing flames and smoke as the first device traveled through the air before it struck a barrier and extinguished itself a few feet from police officers. Balat then retrieved a second device from Kayumi before lighting it and starting to run. He dropped the second device on the street where several police officers were standing. The device appeared to emit smoke but also did not explode.

After apparently igniting the second device, Balat dropped it near where several NYPD officers were standing, ran away, and jumped over a barricade. He was tackled and arrested by NYPD officers shortly thereafter, as was Kayumi.

An FBI Special Agent Bomb Technician conducted a preliminary examination of the devices and determined that they were each approximately the size of a mason jar, each had an attached fuse, and each had nuts and bolts attached to the exterior, surrounded by duct tape. A preliminary analysis of the first device, the one Balat threw into the crowd, showed that it contained TATP, a highly volatile explosive colloquially known as the "Mother of Satan" and extremely sensitive to impact, friction, and heat.

These were not firecrackers. They were weapons of mass destruction, filed under federal law as exactly that.

In Their Own Words

As Kayumi was being placed into an NYPD vehicle, an officer's body-worn camera captured someone asking why he had done this. The 19-year-old responded with "ISIS." After waiving his Miranda rights, Kayumi also told authorities he watched ISIS propaganda on his phone, and his actions were partly inspired by the terrorist group.

Balat was less measured. When Balat was placed in a separate police car, he made statements without being questioned. An officer's body-worn camera captured him saying, "This isn't a religion that just stands when people talk about the blessed name of the Prophet."

Then, at the precinct, he asked for a piece of paper. What he wrote on it removes any ambiguity about motive or affiliation.

"All praise is due to Allah lord of all worlds! I pledge my allegiance to the Islamic State. We take action."

When officers asked Balat whether he was aiming to accomplish something akin to the bombing of the Boston Marathon, Balat replied, "No, even bigger." The Boston bombing killed three people and wounded hundreds. That, to Emir Balat, was an underachievement.

Let that sink in.

The Charges and What They Signal

The Southern District of New York did not file misdemeanor assault charges. They did not file local explosives violations. They filed terrorism charges. The language of the indictment is deliberate, and it carries weight.

Retired FBI supervisory special agent Jason Pack explained the significance:

"Material support requires prosecutors to show the defendants knowingly supported a designated terrorist organization. The selection of charges signals how prosecutors are framing the ISIS nexus evidence."

Pack also noted what the use of TATP tells investigators about how this radicalization happened:

"When you see TATP in a domestic case, it often points to online radicalization."

Investigators are looking into the overseas travel for Balat and Kayumi. Balat left the U.S. for several months and traveled to Istanbul from May 6 to Aug. 26, 2025. Whether that trip was recreational or operational is precisely what the intelligence side of this investigation is now working to answer.

A spokesperson for Neshaminy High School said Balat is a senior there, but he was enrolled virtually and has not attended in-person classes since September. Kayumi is a 2024 graduate of Council Rock High School North. Two young men from American suburbs. Both radicalized. Both armed. Both ready.

The Storage Unit and What Comes Next

According to Fox News, the FBI was conducting a court-authorized search in connection with Balat and Kayumi's terrorism case Monday, searching a storage facility in Langhorne on South Flowers Road. FBI bomb technicians were seen in tactical gear searching for more evidence. The criminal complaint referenced a notebook listing materials associated with TATP production, including hydrogen peroxide, sulfuric acid, acetone, aluminum cans, and bolts. The storage unit search suggests investigators believe there is more to find.

Pack framed the dual-track approach clearly:

"The criminal case builds the prosecution. The intelligence side examines travel, communications, online activity and whether anyone else was involved."

That last clause matters. "Whether anyone else was involved." Two teenagers do not independently synthesize military-grade explosives from an online recipe, independently pledge allegiance to ISIS, and independently decide to drive to New York City on the same Saturday morning. The network question is open. The storage unit may help answer it.

The Response From Officials

Attorney General Pamela Bondi did not equivocate:

"This was an alleged ISIS-inspired act of terrorism that could have killed American citizens. We will not allow ISIS's poisonous, anti-American ideology to threaten this nation."

Deputy Attorney General Todd Blanche added that "these men allegedly sought to inflict mass casualties in service to ISIS with the hope of exceeding the carnage of the Boston Marathon bombing."

NYPD Commissioner Jessica Tisch was equally direct: "This was a planned attack motivated by extremist ideology and inspired by a violent foreign terrorist organization."

Mayor Mamdani issued a statement as well.

"Emir Balat and Ibrahim Kayumi have been charged with committing a heinous act of terrorism and proclaiming their allegiance to ISIS. They should be held fully accountable for their actions."

He followed with a pledge to keep New Yorkers safe and not tolerate terrorism. Those are the right words. What conservatives will watch is whether the institutional and political culture Mamdani represents follows through on them, or whether the next chapter involves prosecutors who find creative ways to soften the ISIS nexus in court. The charges are federal, which provides some insulation from local politics. That is worth noting.

The Neighbors Didn't See It Coming

Balat's neighbor Violeta Sadauskiene told reporters, "There was zero suspicious stuff going on at their house." Kayumi's father Khayer Kayumi said of his son, "If he's going to be five minutes late, he calls." Both families were blindsided. Both families, by all accounts, had no idea.

This is the nature of online radicalization. It doesn't require a mosque, a handler, or a training camp. It requires a phone, a YouTube algorithm, and enough time. ISIS, al-Qaeda, and pro-Iranian groups have intensified recruiting and calls for violence online since the war with Iran started just over a week ago, according to law enforcement sources. The digital pipeline that radicalized these two young Americans is still running. The storage unit in Langhorne may be empty now. The pipeline is not.

No one was injured on March 7. NYPD officers ran toward the smoke rather than away from it, and that discipline is why this story ends with two arrests instead of a mass casualty count. The next time, the fuse may burn longer. The devices may be better built. The crowd may be larger.

The threat is not theoretical. It showed up in a mason jar, with bolts wrapped in duct tape, on a Saturday afternoon in Manhattan.