Toxicology results show there were 'no illegal substances' in Amy Winehouse's body at the time of her death, her family said today.
The Back to Black singer was found dead at her flat in north London on 23 July.
The family statement said: 'Toxicology results returned to the Winehouse family by authorities have confirmed that there were no illegal substances in Amy's system at the time of her death.
'Results indicate that alcohol was present but it cannot be determined as yet if it played a role in her death.
'The family would like to thank the police and coroner for their continuing thorough investigations and for keeping them informed throughout the process.'
A post-mortem on the 27-year-old's body failed to establish a formal cause of death and the family await the outcome of an inquest in October.
Her death is not being treated by police as suspicious.
A formal inquest opened on 25 July and was immediately adjourned until 26 October, allowing the body to be released to her family for her funeral, which took place the following day.
Winehouse rocketed to fame after winning five Grammy awards off the back of her 2006 second album 'Back to Black', including the single 'Rehab'.
Known for her distinctive voice, Winehouse's debut album 'Frank' was released in 2003 and brought her wide acclaim.
The follow-up, 'Back to Black', was a worldwide smash hit, reaching number one in Britain and number two in the US charts.
She married Blake Fielder-Civil in Miami in May 2007 but they had a tempestuous relationship.
He spent part of their marriage behind bars for an attack on a pub landlord and a subsequent attempt to cover it up.