Lindsay Lohan OK after wreck on coastal highway

Updated 8:58 PM ET

(CBS/AP) Lindsay Lohan emerged uninjured from a collision with a dump truck on a coastal highway near Los Angeles on Friday, returning to the set of her new movie hours after the accident left the sports car she was driving crumpled.

Santa Monica Police Sgt. Richard Lewis said there was no sign Lohan was driving while impaired and that his agency would continue to investigate who was at fault in the wreck. The truck's driver was uninjured and that driver also showed no signs of driving under the influence, Lewis said.

"We're treating this as a regular accident," Lewis said.

The actress was rushed to a hospital emergency room in Los Angeles on Friday after suffering a serious car accident.

According to the TMZ, which first reported the news, Lohan totaled her black Porsche after she crashed into the back of an 18-wheeler on the Pacific Coast Highway.

The accident at around 11:40 a.m. Friday on the Pacific Coast Highway occurred while Lohan was on her way to film scenes for the Lifetime movie "Liz and Dick," which chronicles the love affair between Elizabeth Taylor and Richard Burton. Lohan's publicist Steve Honig said the actress was released about two hours after the accident and was returned to the set to continue filming.

"Fortunately, no one was seriously injured in the accident," he wrote in an email.

Lohan was driving with her assistant, who police said was not seriously injured.

"First and foremost, we're concerned about the well-being of Lindsay and anyone else who may have been involved in the accident," Lifetime spokesman Les Eisner said, adding, "Lindsay has been doing fantastic work on the set of `Liz and Dick."'

Production on the film started earlier this week and was expected to conclude around the end of June.

Recently, Lohan has been trying to get her life back on track. She's been filming a Lifetime movie on the love affair between Elizabeth Taylor and Richard Burton. She remains on probation in a necklace theft case, but is no longer being supervised by a judge or probation officer.

Earlier this year, a nightclub manager claimed the actress struck him with her car, but police dismissed the case due to lack of evidence and doubts about his credibility.

In 2007, she was arrested for a DUI in connection with a Memorial Day weekend car crash.

TMZ has photos of Lohan's totaled car from Friday, which can be found here.