Shia LaBeouf has had a four-hour operation on his left hand
US actor Shia LaBeouf's left hand was "crushed" in a car crash in Hollywood last weekend, his lawyer has revealed.
The Indiana Jones and Transformers star had "extensive" surgery and there is "a substantial" risk of infection or other complications, Michael Norris said.
LaBeouf was arrested on suspicion of drink-driving but police have said the crash was not his fault.
The Transformers sequel, which LaBeouf has been filming, may be rewritten to work the injury into the storyline.
"He will need regular medical supervision until his doctors clear him to return to work," Mr Norris told the Associated Press (AP) news agency.
The actor had a four-hour operation on the hand and his left arm is immobilised from the elbow down, Mr Norris added.
"His doctors remain hopeful that he will fully recover, but due to extensive surgery and the nature of the injuries, there remains a substantial risk of both infection and other complications."
Michael Bay, who is directing Transformers sequel Revenge of the Fallen, told the Access Hollywood TV show: "His two fingers are pretty smashed.
"But we're figuring out a way to shoot around it, kind of write it into the story."
The crash happened in West Hollywood in the early hours of last Sunday.
Sheriff's spokesman Steve Whitmore has said LaBeouf was not at fault and that the other driver apparently ran a red light.
The actor recently played Mutt Williams alongside Harrison Ford in Indiana Jones and The Kingdom of the Crystal Skull.