UPDATE (9:45 AM ET): Video from San Diego 6 and the official statement from the Navy:

Navy’s written statement on Campos’ death

FOR IMMEDIATE RELEASE

JULY 31, 2009

NAVY: JONATHAN CAMPOS FOUND DEAD

Petty Officer Jonathan Campos was found unresponsive on his cot at the Marine Corps Base Camp Pendleton brig by staff personnel at approximately 12:21 p.m. PDT, Friday.  Campos had previously been checked at 11:45 a.m. in satisfactory condition.  Brig staff immediately started CPR, and Naval Hospital Camp Pendleton emergency crews transported Campos to the base hospital. He was pronounced dead at 1:15 p.m. The apparent cause was self-inflicted asphyxiation.  Campos was incarcerated at the brig on suspicion of the murder of Seaman August Provost on June 30 at Camp Pendleton. Both Campos and Provost were assigned to Assault Craft Unit 5. Campos had been charged with murder and a series of other crimes, including illicit drug use, larceny, burglary, and theft, arson, and unlawful handling of a deceased individual.

3 AM ET: This story just being reported via ABC::

The U.S. Navy says a sailor charged with the murder of a seaman has committed suicide in the brig at Camp Pendleton.

A Navy news release says Petty Officer Jonathan Campos, of Lancaster, was found unresponsive in his cell Friday afternoon. He was rushed to the base hospital where he was later pronounced dead.

Officials say the apparent cause of death was asphyxiation.

The release says Campos had last been checked early Friday afternoon.

CNN is confirming the report of Campos’ death as a suicide.