Ledger post-mortem results inconclusive

Results of a post-mortem on Hollywood star Heath Ledger are inconclusive, US authorities said today.

The 28-year-old actor was found dead at his New York apartment yesterday.

Police are treating his death as possibly drug-related and said sleeping pills were found close to his body.

However, a spokeswoman for the medical examiner's office said an autopsy had proved inconclusive and further tests are needed - which could take around 10 days.

There were unconfirmed reports today that the 'Brokeback Mountain' star was suffering from pneumonia at the time of his death.

His family say his death was accidental.