The tragic passing of Amy Winehouse over the weekend is still being investigated. Detectives may not know what killed the 27-year-old singer for another few weeks.

An autopsy completed on Monday did not draw any conclusions. Results from lab tests on her blood and tissue are due in about two to four weeks, according to Scotland Yard. “It did not establish a formal cause of death and we await the results of further toxicology tests,” a police statement said.

Winehouse’s parents visited the makeshift shrine outside their daughter’s home in London’s Camden neighborhood on Monday to thank mourners for their support.

“I can’t tell you what this means to us. It really is making this a lot easier for us,” said her father Mitch Winehouse.

“Amy was about one thing and that was love. Her whole life was devoted to her family and her friends and to you guys as well, so we’re devastated and I’m speechless. But thanks for coming.”

Police were called to the singer’s Camden Square apartment on Saturday afternoon in response to a report of “a woman found deceased.” Her father was informed of his daughter’s death while preparing for a New York show with his band at the Blue Note club.

Fans and celebrities flooded Twitter to pay tributeto the Grammy-winning songstress, who died at the same age as legendary icons including Kurt Cobain, Jimi Hendrix, and Janis Joplin.

Amy Winehouse’s family and friends gathered to say goodbye to the beloved soul singer. Mourners shared prayers, tears, and laughter at Golders Green Crematorium in London on Tuesday before heading to Southgate Progressive Synagogue for a private funeral that was attended by 300-400 people including the 27-year-old’s mother and father, brother Alex, recent boyfriend Reg Traviss, protégée Dionne Bromfield, and producer Mark Ronson. Kelly Osbourne sported her blonde hair in a beehive in tribute to her friend.

During the “joyful” celebration, Winehouse’s father Mitch spoke about his headstrong daughter.

“Goodnight, my angel, sleep tight. Mummy and daddy love you ever so much,”

he said at the end of his emotional eulogy. He plans to set up a foundation in her name to help people struggling with addiction.

The Jewish service included prayers in English and Hebrew and concluded with a rendition of Carole King’s “So Far Away,” which father and daughter had often sung together.