LOS ANGELES (AFP) - Lawyers for Mary-Kate Olsen said Tuesday the actress had nothing to with drugs found near Heath Ledger's body following the Australian star's death from an accidental overdose earlier this year.

A statement from attorney Michael C. Miller said former child star Olsen had co-operated with investigators probing the source of drugs involved in the death of Ledger, who died in New York in January.

The statement followed recent tabloid reports that Olsen had demanded immunity from prosecution in exchange for co-operating with investigators.

However Miller said Olsen, a close friend of Ledger, had no knowledge of drugs consumed by "The Dark Knight" star or found in his apartment.

"Despite tabloid speculation, Mary-Kate Olsen had nothing whatsoever to do with the drugs found in Heath Ledger's home or his body, and she does not know where he obtained them," Miller said.

"Regarding the government's investigation, at Ms. Olsen's request, we have provided the government with relevant information including facts in the chronology of events surrounding Mr. Ledger's death and the fact that Ms. Olsen does not know the source of the drugs Mr. Ledger consumed.

"We don't know the source of the information being quoted in the media regarding the government's inquiry, but these descriptions are incomplete and inaccurate.

The Drug Enforcement Administration is reportedly probing whether Ledger was over-prescribed medicine prior to his death. An autopsy found that the star's death was caused by a lethal cocktail of painkillers and anti-anxiety drugs.

Source: AFP