A Pittsburgh man was arrested Saturday night, charged with brutally assaulting a postal worker and then barricading himself inside his Brookline home.

Mt. Lebanon police were dispatched to Dorchester Avenue and Good Way just before 4:30 p.m. Saturday for a report of a man who had assaulted a U.S. postal worker nearby on Castlegate Avenue. They arrived to find the bloodied victim along with a broken baseball bat.

Witnesses told police they saw someone punching the victim inside his postal van, according to a criminal complaint. They said the man, with long hair, shirtless and covered in blood, then walked down Dorchester Avenue toward Midland Street.

The postal worker told police the man who attacked him was Matthew Harrison, 43, who lived nearby on the 600 block of Dorchester.

Police said the victim had been beaten severely.

“Both wrists/arms were visibly broken, with bones nearly exposed on the arms and wrist,” Mt. Lebanon Officer Jacob Elk wrote in a criminal complaint. “His right hand was swollen and bruised. He also had several large lacerations on both arms. I observed several large bruises on his back.”

Police said the postal worker was “covered in blood from his head to his legs.” The victim was taken to Mercy Hospital, and police established a perimeter around Harrison’s home, according to court documents.

The victim told police he was delivering mail when he was struck in the head from behind with an unknown object, which police suspect was the baseball bat found at the scene, according to a criminal complaint. Having delivered mail in the area for 25 years, police said the man was able to recognize Harrison, and said the two had never had any issues in the past.

After a standoff lasting several hours, Harrison was taken into custody, charged with aggravated assault and attempted criminal homicide.

Harrison was denied bond and taken to the Allegheny County Jail. He faces a June 8 preliminary hearing.

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