4 injured breaking up dog attack in Dolores Park

San Francisco police are seeking the public's help identifying the man and the two dogs pictured here. The pit bulls attacked a another dog, biting it and four people in Dolores Park. San Francisco police are seeking the public's help identifying the man and the two dogs pictured here. The pit bulls attacked a another dog, biting it and four people in Dolores Park. Photo: San Francisco Police Department Photo: San Francisco Police Department Image 1 of / 1 Caption Close 4 injured breaking up dog attack in Dolores Park 1 / 1 Back to Gallery

Four people and a small dog were bitten when two pit bulls attacked them in Dolores Park, police said.

The incident occurred on Sunday just before 11:45 a.m., police said, when the three dogs were in the designated off-leash area in the park. The two pit bulls, one brown and one gray, attacked a Lhasa apso named Bloom, police said, leaving her with puncture wounds to her back.

Bloom’s owners and other family members attempted to break up the three dogs, and four had their hands bitten in the process. Three of the bite victims were taken to a hospital for further treatment, police said, and Bloom was taken to a veterinarian.

The pit bulls were put on leashes by a man who left the scene without providing any personal information or information on the dogs’ vaccination record. Police said he was last seen going north on Noe Street, but a search of the area failed to locate the man or the dogs.

Anyone with information about the incident can contact the San Francisco Police Department’s Vicious and Dangerous Dog unit at 415-553-9182.

Annie Ma is a San Francisco Chronicle staff writer. Email: ama@sfchronicle.com Twitter: @anniema15