Two men have been arrested on suspicion of fatally stabbing a 21-year-old Camp Pendleton Marine during a fight in San Diego’s Gaslamp Quarter, police said Sunday.

Officers arrested Jose Oscar Esqueda, 30, and Jeff Shai Holliday, 24, about 11 p.m. Saturday, said San Diego police Lt. Todd Griffin.

The men are suspected of murdering Ryan Evan Harris, an Oceanside resident, during a fight that broke out on Island Avenue near J Street early Friday.

The victim’s brother-in-law, Koert Spears, said Harris was with several friends, some of whom were also Marines, when the melee erupted. Police told the family that Harris was trying to break up the fight when he was stabbed, Spears said.