Federal law enforcement officials have arrested Jonathan Kramer, 21, of Valencia, Pennsylvania, on charges related to planning an attack in support of the Islamic State of Iraq and Syria (ISIS). Kramer was taken into custody on Sunday outside a hotel in Cranberry Township, about 25 miles north of Pittsburgh, following an FBI investigation. According to officials, Kramer had armed himself with weapons and planned a mass casualty attack after pledging allegiance to ISIS. The FBI described the planned attack as an "imminent threat of violence inspired by ISIS." During a press conference, Richard Evanchec, special agent in charge for the FBI's Pittsburgh field office, stated that Kramer had attempted to encourage and coordinate violence through encrypted platforms, discussing methods such as chemical poisons, vehicle attacks, drone delivery explosives, and firearms-based assaults. A search of Kramer's hotel room and home uncovered a semi-automatic rifle, loaded rifle magazines, a rifle scope, boxes of ammunition, 30 knives, and a note. The note, according to court paperwork, stated, "I can't live in constant fear." Court documents reveal that Kramer was charged with receiving a firearm with the intent to use it in a felony or act of terrorism. Federal prosecutors allege that Kramer, using a Telegram username @ShootIntoACrowd, posted threatening statements and documents on how to make explosives, C4, and car bombs. A magistrate judge ordered Kramer detained at his initial appearance on Monday. FBI Director Kash Patel stated that Kramer was allegedly plotting a violent attack in support of ISIS, engaging with ISIS propaganda online, building attack concepts, and repeatedly expressing extremist rhetoric while acquiring weapons believed to be in preparation for the attack. Attorney General Todd Blanche noted that Kramer's efforts were thwarted by the "outstanding work" of federal law enforcement as the country observed the 25th anniversary of Sept. 11. During Kramer’s arrest, federal investigators seized a Panther Arms semiautomatic rifle, over 150 rounds of ammunition, two loaded rifle magazines, a rifle bipod and scope, a prayer rug, and pepper spray, among other materials. His phone was tucked into two Faraday bags, which block a device’s signal, and he carried a burner phone, according to the complaint. Kramer remarked to the FBI at the time of the search that he was "f--ked," according to the complaint. At his parents’ home, the FBI found 30 knives and an undated note that read: "DoNt look For me[.] IDK what I did buT I cant live In constant Fear[.]" Kramer was on the Justice Department’s radar since 2023 for his activity in a Telegram chat room, where he allegedly discussed plans to carry out an attack and received pornographic images and videos from a minor. In April 2023, an FBI search of Kramer’s home revealed a laptop with a recording of Kramer reciting a pledge of allegiance to the Islamic State militant group. From April 2023 to March 2026, Kramer was in a juvenile detention facility. Upon release, a probation officer informed the FBI that Kramer had a black banner in his possession, which the FBI believed to be an ISIS flag. Kramer returned to the FBI’s radar shortly after his release. A tipster close to Kramer told the FBI in March that he ordered "mysterious" packages he hid from his parents and that he was "talking to his friends from before," according to the complaint. A recent search of Kramer’s laptop revealed propaganda from ISIS and Hamas. Investigators believe Kramer suggested the idea of a school shooting in a Reddit post. One of Kramer’s posts on Telegram depicted multiple individuals in dark tactical-style clothing obtaining weapons and grenades with the overlaid text which stated, "Me And My Friends Getting Ready For School." Kramer’s alleged planning document highlighted poisonings, large trucks, and firearms as "methods to increase your jihad’s destruction." He promoted "distracting emergency services" as a strategy for carrying out an attack. "I might be able to carry out an operation soon against the kuffar, please pray for my success brothers," Kramer allegedly wrote to the online community on May 26.