A report says that communication and coordination problems between six law enforcement agencies hampered the police response as cop-turned-killer Christopher Dorner went on a 10-day rampage across Southern California last year.

The report, released Monday by the Washington, D.C.-based Police Foundation, praised the overall work of police and sheriff's officials in four counties but identified several areas for improvement.

For example, too many officers raced to the scene when authorities had Dorner holed up in a cabin in the San Bernardino Mountains, creating a dangerous situation.

Dorner, who had been fired from the Los Angeles Police Department, eventually shot himself in the burning cabin.

He killed four people during his revenge mission, including a San Bernardino County sheriff's detective who was shot during the final gunbattle.