A Los Angeles police officer was shot and critically wounded early Monday responding to a domestic-violence call in the San Fernando Valley, according to multiple law-enforcement sources familiar with the incident.

The officer, who was not immediately identified, was taken to Providence Holy Cross Hospital in Mission Hills after being shot at least twice by the suspect. The shooting occurred around 4 a.m. inside a residence in the 13600 block of Dronfield Avenue.

Sources said one of the gunshot wounds was to the officer's upper torso and that he was listed in critical condition. The suspect was reported still to be inside the residence as LAPD officers swarmed the neighborhood after the shooting.

The circumstances of the shooting were sketchy, but sources said it appeared that the officer responded to the home after a help call went out from the Fire Department. Authorities had responded to the residence earlier, and it was believed that the suspect already had left the location.

[Updated at 5 a.m.: Police had surrounded the home, but it was unclear whether the suspect was still inside.]