SAN FRANCISCO -- Homicide investigators were at one of San Francisco's most popular tourist spots -- Twin Peaks -- early Monday after a man was found shot to death.

According to Sgt. Neville Gittens of the San Francisco Police Department, witnesses heard gunfire and saw a black sport utility vehicle fleeing the scene around 1 a.m. today. It has not been determined whether the driver of the SUV was involved in the shooting.

The victim -- Ahmaad Oliver, 24, of San Francisco --had been shot several times. Responding officers found Oliver's body and paramedics pronounced him dead at the scene, according to police. . In the other shootings, Satia Norris, 27, of San Francisco, has been identified as the man who was shot and killed late Saturday night in San Francisco, according to the medical examiner's office.

Norris was in a parked car with two friends near the intersection of 26th and Harrison streets when a suspect, described only as a black male, approached the car at 11:40 p.m., according to police.

Norris was transported to San Francisco General Hospital where he died a few hours later.

The suspect shot at the victim, striking him twice, police report. The victim's friends took him to San Francisco General Hospital, where he died at 2:15 a.m. Sunday.

A shooting in the Bayview on Saturday around 5 a.m. in the first block of Cameron Way also ended in a fatality, according to police. The victim has been identified as Charles Baldain, 29, of San Francisco.

Baldain was sitting in his vehicle on Cameron Way when at 4:45 a.m. he was approached by a suspect who attempted to rob him, according to police Sgt. Neville Gittens.

According to Gittens, the suspect shot Baldain as he attempted to drive away. Baldain then smashed his car into some nearby parked cars and was pronounced dead at the scene. Police said they have no suspects in that shooting.

In another Mission District shooting, a victim was shot in both legs around 1 a.m. after exiting a bus near 24th and Capp streets, a police dispatcher said. The dispatcher said Sunday that the victim was in serious but stable condition at San Francisco General Hospital.

Police responded around 2 a.m. to another shooting that took place near 20th and Lexington streets, less than one mile away from the shooting near 24th and Capp streets.

According to the dispatcher, a Hispanic male fired four to five shots while leaning out the window of a black car with tinted windows.

A bullet grazed the left ankle of a victim, who suffered minor injuries, the dispatcher said. Police are treating the shootings as separate incidents at this time.