PITTSBURGH (AP) — A driver rammed a car into a security gate at the FBI building in Pittsburgh early Wednesday, then removed an American flag from the back seat and threw it over the gate before leaving, authorities said.

The car crashed into the gate at about 2:40 a.m., the FBI said, and authorities were searching for the man. Investigators, including a bomb squad, were at the scene. No explosives were found, the FBI said.

“We look at this as an act of terror against the FBI,” Christopher Giordano, assistant special agent in charge of the FBI in Pittsburgh, told reporters. “This was a targeted attack on this building. Thankfully no one was hurt, but we are going to exhaust every ability we have under the federal law to find, apprehend and prosecute this subject to the fullest extent.”

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