Monday's pre-dawn attack on the La Mision police station damaged the facade of the building on the highway between Tijuana and Ensenada. At least five parked patrol cars were also shot up.
No injuries were reported.
State prosecutors said in a statement that they found nearly 200 bullet casings at the scene. Two cars reported stolen in California were discovered abandoned nearby and appear to have been used in the shooting. SignonSanDiego.com is reporting that the vehicles were a Chevrolet SUV and a pickup.