A search is underway for a man accused of committing an "act of terror" by allegedly using his car to ram the entrance gate to the FBI's Pittsburgh Field office.

The FBI says they're searching for Donald Henson, of Penn Hills, who they say used his car to ram the gate to the building around 2:40 a.m. on Wednesday.

FBI Pittsburgh Assistant Special Agent In Charge Christopher Giordano said early Wednesday that after crashing into the gate, Henson grabbed an American flag from inside the vehicle and threw it over the gate.

"We look at this as an act of terror against the FBI," Giordano said. "This was a targeted attack on this building."

No one was reported injured at the time of the crash, according to the FBI.

The FBI is looking for a man they've identified as Donald Henson, of Penn Hi

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