Hollywood actress Anne Heche in coma since car crash

The actress is in critical condition and connected to a breathing machine

Anne Heche is in the hospital after an accident in which her car crashed into a house. Invision / AP

Hollywood actress Anne Heche remains in hospital in critical condition, comatose and connected to a breathing machine on Monday, four days after suffering severe injuries in a fiery Los Angeles car crash, a spokesperson for the performer has said.

Heche, 53, has been in hospital since the compact car she was driving sped out of control in a Westside neighbourhood of Los Angeles late on Friday morning, ploughed into a house and burst into flames, according to the police.

No one inside the home was hurt, but the impact set the dwelling ablaze, requiring a response by dozens of firefighters.

A Los Angeles Police Department spokesperson said on Monday that the cause and circumstances of the crash remain under investigation.

Heche is in a coma and has not regained consciousness since the accident, said Michael McConnell, a member of the Los Angeles talent company Zero Gravity Management, which represents her.

"At this time, she is in extreme critical condition," he told Reuters He said Heche "has significant pulmonary injury requiring mechanical ventilation and burns that require surgical intervention".

The Los Angeles Times quoted a Venice Beach salon owner, Richard Glass, recounting a visit by Heche to his shop shortly before the accident, describing her as "a sweet little girl" as she purchased a red wig on Friday morning.

Heche came to prominence for her Emmy-winning work on the daytime television drama Another World and went on to star in other screen roles including the HBO series Hung and such films as Wag the Dog and Cedar Rapids.

She made tabloid headlines in the late 1990s for an affair with comedian Ellen DeGeneres. After their split, Heche married cameraman Coleman Laffoon, but they later divorced and she spent some years after that in a relationship with actor James Tupper, her co-star in the short-lived TV show Men in Trees.