The cause of actor Chris Penn's death is still unknown, despite an autopsy performed yesterday. Toxicology tests were ordered on the Reservoir Dogs star, who was found dead in his Santa Monica home on Tuesday. It is still not clear how he passed away, but Los Angeles police are not treating the death as suspicious.

Los Angeles county coroner's spokeswoman Brenda Shafer said: "An autopsy is just normal procedure for someone who's 40 and has not seen their doctor."

Penn's latest film - 'The Darwin Awards' - premiered at the Sundance Film Festival on the day of his autopsy. Writer-director Finn Taylor paid his respects to the actor after the screening. He said: "Chris gave an incredible performance in the film. I think he is going to be remembered for years to come and we will miss him."

Penn was the younger brother of Oscar-winning actor Sean Penn. He appeared in numerous films, including Starsky & Hutch, Rush Hour and True Romance.