SAN FRANCISCO -- Gunfire erupted in the streets of San Francisco early Saturday with at least five people wounded in three separate shootings as another weekend began with a rash of escalating violence.

Officer Tim Buelow said police responded to reports of gunshots at 4:13 a.m. at the intersection of Polk and Sacramento streets in the Pacific Heights neighborhood.

According to Buelow, the responding officers found two men suffering gunshot wounds to their legs. They were transported to a local hospital in stable condition.

A third victim left the scene of the shooting and went to St. Francis Memorial Hospital, according to Buelow. Police were not sure about the extent of his injuries.

The victims were very uncooperative, Buelow said, and gave police no description of the shooters. However, witnesses gave police information about a vehicle that they saw at the scene of the shooting.

Police had stopped a vehicle in the area that matched a witness's description and recovered a gun from the car, Buelow said.

Meanwhile, police were investigating two others shootings that happened within 20 minutes of each other.

Officer Walter Contreras said police received report of a shooting around 1:40 a.m. at 16th and Mission streets. They found one victim, a woman in her 40s, suffering a gunshot wound to her leg. She was transported to San Francisco General Hospital, where she was in stable condition, according to Contreras.

The second shooting occurred around 2 a.m. in a house on the 2000 block of Toledo Street, Contreras said. Responding officers found the victim, a 20 to 25 year-old man, lying on the floor.

According to Contreras, the victim was possibly struck in the head with a bullet and was listed in critical condition at San Francisco General Hospital.

Police do not have any suspects in custody at this time for either incident.