Lindsay Lohan was treated in hospital Friday after rear-ending a truck in her Porsche, trashing the car but only causing minor injuries to the perenially troubled actress, police said. The 25-year-old spent two hours undergoing tests after the accident in which the car she was driving smashed into a 18-wheel big rig on the Pacific Coast Highway, west of Los Angeles. \"A black Porsche rear-ended a large dump truck,\" said Santa Monica Police Department spokesman Richard Lewis. Pictures of the car showed its front end totally crushed, and the TMZ celebrity website said Lohan suffered bruises and bleeding in the crash. An assistant was also in the car at the time. Police said there was no indication that Lohan was under the influence of alcohol or drugs, unlike in 2007 when she was convicted of driving under the influence (DUI), having tested positive for booze and cocaine. A publicist for Lohan said the actress was on her way to a movie set when the crash occurred, and she was taken to a hospital \"as a precaution,\" but was released in less than two hours and was \"fine\". \"Everything is OK,\" publicist Sophie Goodale told AFP. After leaving hospital she headed straight to the set of her latest film, a television movie about Hollywood legend Elizabeth Taylor and her stormy romance with actor Richard Burton. The \"Liz and Dick\" role is a break for Lohan, who after a promising early start has become known chiefly as a hell-raising celebrity with substance abuse problems and frequent brushes with the law. In March an LA judge formally ended Lohan\'s probation after a long string of court appearances, but told the \"The Parent Trap\" and \"Freaky Friday\" star to \"stop the nightclubbing\" and behave more maturely.