SAN BERNARDINO -- The death of Rodney King earlier this year was ruled an accidental drowning and there were multiple illegal drugs in his system, police said Thursday. King was the black motorist severely beaten by Los Angeles police officers in 1991. The officers' acquittal triggered the devastating 1992 Los Angeles riot.

Rialto police said the county medical examiner's report showed the 47-year-old King had drugs such as PCP, cocaine and marijuana in his system when he died in June, the San Bernardino Sun reported.

The autopsy report is due to be released later Thursday.

King was pulled from the bottom of his pool June 17 and was pronounced dead at a hospital.