LOS ANGELES (AP) -- Police investigating a crash involving Lindsay Lohan are seeking witnesses to try to determine who was driving the actress' sports car.
Santa Monica, Calif., police say there is no evidence either Lohan or her assistant were impaired at the time of the accident, but they are attempting to determine who was driving the car when it slammed into a dump truck on the Pacific Coast Highway Friday morning.
Lohan was on her way to the set of a Lifetime movie and escaped serious injury. She returned to the film shoot later in the day after being evaluated and released from a hospital.
Police say the truck's driver was not injured and also showed no signs of impairment. Police continue to investigate the incident.
THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.
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 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.
Lohan, 25, remains on probation in a necklace theft case, but is no longer being supervised by a judge or probation officer.
The accident is the latest vehicular mishap for Lohan, who had her driver's license restored in August 2010 after losing her driving privileges because of a pair of DUI arrests in 2008. She is still being sued by three men who claim Lohan forced them to remain in a sport utility vehicle she commandeered and used to chase a woman she thought was her assistant on Pacific Coast Highway. That incident ended in the parking lot of the Santa Monica Police Department, where Lohan was arrested.
Friday's accident comes after the Los Angeles District Attorney's Office last month determined there was insufficient evidence to pursue a case against Lohan in a nightclub manager's claim that the actress struck him with her sports car.
The prosecution said there was a lack of evidence in the case.
Anthony McCartney can be reached at http://twitter.com/mccartneyAP
AP Television Writer Lynn Elber contributed to this report.