FREMONT -- Three suspects targeted and attacked a woman inside a park bathroom this week, leaving her in serious condition, police said.

Officers responded late Tuesday morning to a hospital for a report of a woman who had been severely beaten, said police spokeswoman Geneva Bosques.

The 31-year-old victim told police she was walking the Central Park lake and that when she entered one of the park bathrooms, three people -- at least two of them women -- followed her in and proceeded to hit her.

During the assault, the victim suffered serious injuries to her entire body but managed to make it to her car where she called her sister, who responded to the park and took her to the hospital.

The woman was treated for nonlife threatening injuries and released from the hospital.

The attack appears to be isolated, Bosques said, and remained under investigation on Thursday.

Police described the first suspect as a white woman in her late 20s, about 150 pounds, 5 feet 6 inches, with dyed red hair. She wore a red-hooded sweatshirt, long dangle earrings, bluejeans and black shoes. The second assailant was described as a Hispanic woman with black hair, a skinny build and weighing about 120 pounds. She wore a white tank top, jeans and a zip-up hooded sweatshirt.

The third suspect, who the victim could not identify as being male or female, had short hair and wore baggy jeans and a baggy shirt. That suspect also wore a hat with the logo "NORCAL" on it.

Anyone with information about the incident is asked to contact police at fremontpolice@fremont.gov or call 510-790-6900. Anonymous tips can be left at www.fremontpolice.org/tip.

Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund.