Singer Prince had no known will, sister says in court documents

Singer Prince performs in a surprise appearance on the "American Idol" television show finale at the Kodak Theater in Hollywood, California, May 24, 2006. Prince died Wednesday at the age of 57. (Chris Pizzello/Files/Reuters)

Prince performs on stage at Yas Arena in Yas Island, Abu Dhabi, in 2010. (Jumana El-Heloueh/Reuters)

Prince performs during his "Diamonds and Pearls Tour" at the Earl's Court Arena in London, June 15, 1992. (Dylan Martinez/Reuters)

MINNEAPOLIS — Prince’s sister says the superstar musician had no known will and has asked the court to appoint special administrator of his estate.

Tyka Nelson filed the paperwork Tuesday in Carver County probate court in Minneapolis. Prince died at age 57 on Thursday at his estate in suburban Minneapolis. No cause of death has yet been released.

Nelson is his only surviving full sibling.

Nelson says in her filing that an emergency exists because immediate action is necessary to manage Prince’s business interests.

With some $27 million in property and an outpouring of nostalgia over the pop star’s death, Prince’s heirs could stand to inherit a small fortune. The size of the fortune isn’t clear, and recent disputes suggest money was tight