LOS ANGELES (Reuters) - Troubled actor Tom Sizemore, who is attempting a career comeback by appearing on TV cop shows, was arrested early on Thursday on an outstanding narcotics warrant, Los Angeles police said.

Sizemore, best known for his battle-hardened film roles in "Saving Private Ryan" and "Black Hawk Down," was taken into custody by police responding to a report of gunshots fired in the Mount Olympus area of the Hollywood Hills, police said.

He was booked on US$25,000 bail after officers discovered he had an outstanding narcotics warrant from the central California town of Bakersfield, but Los Angeles police said they had no further information on the warrant.

Another man, described by the celebrity news website TMZ.com as Sizemore's friend, also was arrested on a drug possession offense, police said.

Sizemore has been in and out of California courts and jail for years on various drug charges. In 2005 he admitted using a prosthetic penis to fake a urine test.

He recently made a guest appearance as a drug-using Hollywood figure on the new NBC police drama "Southland." He also played a detective on the cable TV series "Crash," a spin-off of the Oscar-winning movie of the same name.