Gunfire erupted at a suburban San Diego motel while federal agents were serving a warrant, police said.
The shooting occurred around 10 a.m. at a La Mesa motel, though it was not immediately clear whether anyone was injured, Fox5SanDiego.com reported.
Authorities, who did not immediately disclose who fired the shots, believe a woman is in the room with the suspect.
Streets in the surrounding area were being blocked off to traffic.
No other information was released.