London ( CNN ) -- Investigators may not know what killed singer Amy Winehouse until they get results from lab tests on her blood and tissue , due in about two to four weeks , according to Scotland Yard Monday . An autopsy was completed at St. Pancras Mortuary Monday afternoon , two days after the singer died in her London apartment . `` It did not establish a formal cause of death and we await the results of further toxicology tests , '' a police statement said . An inquest into her death was opened Monday , the statement said . `` Inquiries continue into the circumstances of the death , '' London 's Metropolitan Police , also known as Scotland Yard , said in a statement Sunday . At this stage , the 27-year-old 's death `` is being treated as unexplained and there have been no arrests in connection with the incident , '' police said . The singer , beloved for her talent but infamous for erratic public behavior , arrests and drug problems , was found dead at her apartment in London on Saturday . Winehouse 's family said in a statement Sunday it `` has been left bereft by the loss of Amy , a wonderful daughter , sister , niece . She leaves a gaping hole in our lives . We are coming together to remember her and we would appreciate some privacy and space at this terrible time . '' `` We are trying to come to terms with the death of a dear friend and colleague , the most amazing artist and talent , '' her management company , Metropolis Music , said Sunday . `` We will always remember Amy as a vibrant , funny , caring young woman who made everyone around her feel welcome . We have lost a very special person , part of our family . '' Her funeral will be held Tuesday , the singer 's spokesman Chris Goodman said . Sparse details are being released about the ceremony -- including exactly when and where it will occur -- though Goodman said `` it will be a small , private event for a few friends and family . '' Winehouse 's soulful , throaty vocals brought the British musician stardom in 2007 , but her troubled off-stage life -- chronicled in her Top 10 hit `` Rehab '' -- won her notoriety . Her death came less than two months after her latest release from a rehabilitation program and weeks after she was booed offstage by disappointed fans in Belgrade , Serbia . Winehouse died at the same age as at least four other recent music legends . Jimi Hendrix , Janis Joplin and Jim Morrison each died of drug overdoses when they were 27 . Kurt Cobain was 27 when he committed suicide , soon after his release from rehab . Police were called to Winehouse 's Camden Square apartment just after 4 p.m. Saturday in response to a report of `` a woman found deceased , '' authorities said . `` Everyone who is involved with Amy is shocked and devastated , '' Winehouse spokesman Chris Goodman said . `` Our thoughts are with her family and friends . '' Her father , Mitch , got word of his daughter 's death Saturday while in New York preparing for a Monday night show with his band at the Blue Note club , his publicist said . He immediately canceled the performance and caught a flight back to London , the publicist said . Winehouse 's official website carried nothing but a black-and-white photo of the singer . On Saturday , a statement on the site said Winehouse was `` withdrawing from all scheduled performances . '' Her song `` Rehab , '' in which she sang `` They tried to make me go to rehab , I said no , no , no , '' helped form the public 's view of Winehouse . She told CNN in a 2007 interview , `` I do n't care enough about what people think of me to conform to anything . '' The London-born singer was a tattooed teenage rebel after she was expelled from a prestigious performing arts school . Her first album , `` Frank , '' debuted in 2003 , when the singer-songwriter was 19. International success came with her 2007 album `` Back to Black . '' She dominated the 2008 Grammys , winning five awards that night and delivering , via satellite from London , a strong performance of `` Rehab . '' Winehouse 's volatile marriage to Blake Fielder-Civil took a toll on the singer 's career . The couple divorced in 2009 after a stormy two years filled by drug addiction and arrests . Winehouse 's parents went public with their efforts to help their daughter , telling the London Telegraph in 2009 that she was on the road to recovery . `` A gradual recovery , which is good , '' Winehouse 's father told the Telegraph . `` With slight backward steps -- not drug backward steps , more drink backward steps if you follow my drift . I think that will be the pattern of recovery . '' The organization that awards the Grammys issued a statement Saturday calling Winehouse `` a dynamic performer and musician who seamlessly blended rock , jazz , pop , and soul and created a sound all her own . '' `` Her rich , soulful and unique voice reflected her honest songwriting and earned her a devoted fan following , critical acclaim , and the genuine respect and admiration of her musical peers , '' the Recording Academy statement said . `` She will forever be remembered for her immense talent , and her music will live on for generations to come . Our deepest sympathies go out to her family , friends , and fans during this difficult time . '' CNN 's Bharati Naik , Denise Quan and Alan Duke contributed to this report .
NEW : This means the product will ship as received by the manufacturer, sealed, with all advertised components, and with the manufacturer warranty. The autopsy `` did not establish a formal cause of death , '' the coroner says . Lab tests may reveal what killed the singer , the coroner says . The 27-year-old singer was found dead at her home Saturday .