Lohan, 20, and two other people were in her 2005 Mercedes SL-65 when it crashed on Sunset Boulevard around 5:30 a.m., Sgt. Mike Foxen said. It appeared the actress was speeding, Lt. Mitch McCann said at an afternoon news conference.

Officers at the scene found a "usable amount" of a drug tentatively identified as cocaine, McCann said. He declined to say where the drug was found other than to say Lohan was not carrying it.

Lohan, who spent time at a rehabilitation center earlier this year, was driven in another car to a hospital for treatment of minor injuries, McCann said. The two other people in her car were not hurt.

Officers received a 911 call about the accident and arrested Lohan at the hospital for investigation of misdemeanor driving under the influence of alcohol or drugs, McCann said.

She was released from custody because she was admitted to the hospital, police said.