According to detectives, the shooting on the 8700 block of Beverly Boulevard erupted at about 2:10 a.m. after an argument outside Guys & Dolls Lounge, a popular celebrity nightclub.
The argument continued yards away in front of Jerry's Famous Deli next door.
"The argument [was] between about two or three patrons," said L.A. County Sheriff's Lt. Wes Sutton. "One of the suspects pulled out a handgun, fired into the crowd, and we have three victims."
Investigators say three people were taken to the hospital with gunshot wounds. One of the victims, Luis Camargo, a 42-year-old valet parking attendant and father of two, was pronounced dead at Cedars-Sinai Medical Center.
"The suspect shot into the crowd, and we know at least the valet driver's an innocent victim," said Sutton. "We have a second male Hispanic victim that was shot in the abdomen, and then a third, a female black victim who was shot in the leg."
Family members of the slain parking attendant sobbed near the scene of the shooting Monday.
"He was a very nice person. He was a very good dad," said Leticia Tellez, a close family friend of the victim.
Tellez said Camargo was killed right in front of his wife and his 15-year-old son. "She was with him last night working with him. She couldn't believe that was happening to her," she said.
A motive for the shooting was not determined, and no arrests were made.
Detectives said they interviewed several witnesses but had no strong leads.
The shooting suspect is described as an adult male. Witnesses say he jumped into the passenger side of a waiting dark-colored vehicle that sped off going eastbound on Beverly Blvd.
Anyone with information related to the case is urged to call the L.A. County Sheriff's Department Homicide Bureau at (323) 890-5500.