The autopsy for singer Amy Winehouse on Monday established no cause of death and London Metropolitan Police has said that further toxicology tests are needed.
Those tests are expected in four weeks, police told The Associated Press.
Amy Winehouse was found dead in her London home on Saturday. She was 27 years old.
Her father Mitch visited her house on Monday and thanked fans for the tributes they have given since hearing of Amy Winehouse's death.
Mitch has said his daughter was about love and cared for her family, friends and fans.
The family released a statement a day after Amy Winehouse's death stating that her passing left "a gaping hole in our lives."