Autopsy Performed on Amy Winehouse

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Authorities completed an autopsy Monday on the body of Amy Winehouse but the procedure did not establish a formal cause of death. 
Further toxicology tests are being conducted to determine what killed Winehouse, 27, whose body was discovered Saturday in her London home. Results of those tests are expected in two to four weeks. Police have called Winehouse's death "unexplained" but said no evidence was found indicating any suspicious circumstances.
Also Monday, her parents visited mourners outside the singer's north London home to thank them for their thoughts and support. Mitch Winehouse thanked people for coming to visit and laying bouquets, candles and handwritten notes, which have been placed in growing mounds across the road from the Victorian home where his daughter died.