FBI investigation thwarts "mass casualty attack" from Pennsylvania man accused of pledging ISIS allegiance
Updated on: September 15, 2026 / 6:49 PM EDT / CBS Pittsburgh
TL;DR
- Jonathan Kramer, 21, was arrested for an alleged ISIS-inspired mass casualty attack.
- Kramer had pledged allegiance to the Islamic State of Syria and was found with a rifle, ammunition, and 30 knives.
- The FBI's investigation involved surveillance of Kramer's movements and communications.
- Authorities credited public assistance for helping to prevent the planned attack.
- Kramer faces federal charges related to firearms and terrorism.