A man was critically injured when he was shot in the head in San Francisco's Excelsior District early Sunday morning, police said.

Officers responded at 3:33 a.m. Sunday to a report of shots fired at Mission Street and Silver Avenue, where they found the 24-year-old victim suffering from a gunshot wound to his head, according to police.

The victim was taken to San Francisco General Hospital to be treated for his injuries, which are considered life-threatening, police said.

No arrests had been made and no suspect information was available in connection with the shooting.

Anyone with information about the case is encouraged to call the Police Department's anonymous tip line at (415) 575-4444 or send a tip by text message to TIP411.