CARMEL MOUNTAIN RANCH, Calif. — A United States Postal Service supervisor was slashed in the head by one of his drivers Friday evening outside of a post office in Carmel Mountain Ranch, authorities said.

The incident occurred around 5:47 p.m. outside of a United States Postal Service building at 11251 Rancho Carmel Drive, the San Diego Police Department confirmed with FOX 5.

When police arrived on scene, they found a man with a deep cut to his head.

“During our investigation, we came to learn that there was an argument between the supervisor and an employee of the USPS facility during that time a knife was produced,” SDPD Officer Darius Jamset Jee said.

Jee says the employee, a USPS driver, slashed the supervisor and then took off.

The victim went to the hospital for a knife cut to the head, but he is now recovering at home, police said.

Authorities are currently searching for the attacker who is described as a man in his 40s with black hair, standing 5 feet 9 inches and weighing 230 pounds.

The Carmel Mountain Ranch post office also has its warehouse facility on site, which is on federal property.

The U.S. Postal Inspectors Office is also handling the investigation alongside San Diego police.

Anyone with information is encouraged to call Crime Stoppers at 888-580-8477.

FOX 5’s Christelle Koumoué contributed to this story.