Prince Remembered at Private Memorial Held by Former Church

— -- Prince was remembered today at a private memorial service at his former church in his native Minnesota.

The service, held at the Jehovah's Witness Kingdom Hall in Minnetonka, was in honor of the late "Brother Nelson," church officials confirmed to ABC News.

The singer, known to his music fans as Prince, died April 21 inside his Paisley Park estate in Chanhassen. He was 57.

The service was expected to attract between 300 and 500 churchgoers although there's no word yet on how many attended.

According to Prince's sister Tyka Nelson, the family was not involved in the planning of today's memorial. In fact, she had no plans to attend.

"The grief process is a unique experience to each individual and Therefore I support any and all Memorials or Funerals that have happened and/or are being planned...However I will Not be in attendance, because I feel that once...is enough," she wrote Friday in a lengthy post on Facebook.

Nelson added that although an official funeral was slated for April 23, it was "sadly aborted." Instead, "a small group of family and friends" were invited to "an intimate gathering."

Prince's sister said the family will hold an official memorial in August.

The music legend's cause of death has not yet been announced, though an autopsy was performed April 22 and results of toxicology tests are expected in the coming weeks.

Still, some clues to what might have happened keep trickling out. The singer's team contacted his client Dr. Howard Kornfeld, a California-based opioid-addiction specialist the day before he died, according to attorney William Mauzy.

Mauzy added that Kornfeld sent his son, Andrew, to meet with the singer, though when he arrived at Paisley Park, he, among others, discovered Prince unconscious in an elevator.

Meanwhile, earlier this week, a search warrant connected to the death probe showed that Prince had met with another physician, Dr. Michael Todd Schulemberg, April 20 and April 7. Schulemberg was also present when the singer's body was discovered, as he was delivering the results of medical tests.