An hours-long standoff between law enforcement and an armed suspect who tried to break into Cincinnati FBI headquarters Thursday morning and then fled down I-71, shooting at state troopers, has ended with the suspect’s death, according to Ohio State Highway Patrol.

Before the standoff, the unidentified armed suspect tried to breach the FBI’s Visitor Screening Facility at its headquarters in Sycamore Township around 9:15 a.m., the bureau said.

An alarm went off, prompting armed FBI agents to respond and the suspect fled onto northbound I-71, the FBI said in a tweet.

Troopers found the suspect’s vehicle, a Ford Crown Victoria, near the northbound I-71 rest area around 9:37 a.m., where a pursuit began. The pursuit ended with an exchange of gunfire and a standoff, Fox 19 reports.