A motorist was rendered unconscious after what authorities are calling an unprovoked attack that occurred after another driver flashed their high beams at him, authorities say.

According to the Pasadena Police Department, the victim, a 63-year-old man, was driving northbound on Raymond Avenue near Washington Boulevard when a vehicle traveling in the opposite direction flashed him around 1 a.m. Saturday. 

“The victim reported that he was driving northbound on Raymond Avenue from Washington Boulevard when he observed a vehicle traveling southbound flashing its high beams at him,” a Pasadena Police Department spokesperson confirmed to KTLA. “The victim stated he stopped his vehicle and exited. He was then assaulted by an unknown suspect. The assault was unprovoked.” 

The attack left the man unconscious and with a three-inch deep laceration to his head, police added. Upon regaining consciousness, the man transported himself to Huntington Hospital, and it was around 1:20 a.m. when police responded there to a report of an assault with a deadly weapon and began their investigation.

Upon arriving at the hospital, the victim told police that, due to his injuries, he was not able to provide a description of a suspect, vehicle or the weapon used, nor was he able to tell police the exact location where the assault occurred, although it was confirmed to be somewhere near Raymond Avenue and Washington Boulevard. La Pintoresca Park is located near that intersection.

No further details were immediately available.

Anyone with any information on the incident is asked to contact the Pasadena Police Department right away. 

Sofia Pop Perez contributed to this report.