A Huntington Beach man died after being run over by an Orange County Transportation Authority bus earlier in the week, authorities said Thursday.

Police believe the victim, Richard Collins, 53, of Huntington Beach, may have been intoxicated at the time, however a toxicology report is still pending, according to the Huntington Beach Police Department.

Police responded to a pedestrian traffic collision at Huntington Street and Pacific Coast Highway at about 8:20 a.m. Sunday and found Collins lying in the street, authorities said.

Paramedics took Collins to UCI Medical Center in Orange, where he was admitted in critical condition. He succumbed to his injuries Tuesday.

Witnesses told police the OCTA bus had struck the man as it was leaving a stop. Authorities interviewed the driver, a 56-year-old man, at the scene and released him.

Collins was a passenger on the bus and had gotten off at the bus stop. As the bus pulled away from the curb, the victim fell into the street and "was run over by the rear wheels ...," according to the police department's statement.

No arrests or citations have been made.

Anyone with information about the accident may contact HBPD accident investigator Tai Huynh at (714) 536-5670.

— Anthony Clark Carpio

Twitter: @acocarpio