Hollywood actress Lindsay Lohan has been arrested on suspicion of drunken driving after she crashed her Mercedes convertible in Beverly Hills. Police said investigators found what they believe is cocaine in the actress' car after the accident. Witnesses said Lohan, 20, was in her Mercedes convertible when it crashed on Sunset Boulevard on Saturady morning. She suffered minor injuries in the accident and was taken to a Los Angeles hospital. We received a call about the accident and "tracked Lohan to the local hospital, where she was ultimately placed under arrest" for investigation of misdemeanor driving under the influence of alcohol or drugs, police said.

Lt Mitch McCann of the Beverly Hills Police said it appeared as if Lohan was speeding when she lost control of the vehicle. When police impounded her car, they searched it and found something else. It was a usable amount of illegal narcotics that was preliminarily identified as cocaine," McCann said.

Police said Lohan could face additional charges. Her tentative arraignment date is August 24, ABC News Radio reported.

The arrest is the latest chapter in Lohan's history of hard partying. Saturday's was the third car accident she's had in the last two years. The actress recently announced she checked into rehabilitation centre for alcohol abuse in January, though paparazzi cameras have since caught her drinking.

Lohan's latest movie, Georgia Rule, is in theatres now. The actress' other screen credits include Mean Girls, Bobby, A Prairie Home Companion and Freaky Friday.