PETALUNA, CALIF (CBS NEWS)--Two federal agents were shot Thursday morning in Petaluma California, just north of San Francisco, during an Immigration and Customs Enforcement operation, Homeland Security sources told CBS News.

The agents were transported to a hospital, where they are being treated for non-life-threatening wounds. A third agent also received minor injuries in the incident.

The general manager of a Best Western hotel near the incident told CBS Radio station KCBS-AM on air that a loud bang and gunshots were heard around 4 a.m. PT.

In a separate incident in southern California, an ICE agent was found dead of a single gunshot wound, according to Holly Francisco, a spokeswoman for the Los Angeles County Sheriff's Department, which is investigating the incident. ICE released a statement saying the agent was found dead in his home. Francisco told reporters in Carson, Calif., that a child identified as the agent's son was home at the time and called 911.