Superstar Prince died at his estate in Carver County, Minn., on Thursday, his publicist said.
The Carver County Sheriff’s Office had been investigating a death at the estate.
“We are not releasing any information regarding the identity of the person who died until next of kin is notified,” spokesman Jason Kamerud said.
TMZ first reported the singer had died at age 57.
On Friday, Prince was released from the hospital and returned to his Minnesota home after making an emergency landing in Illinois.
Prince has been battling the flu for several weeks, even canceling two shows in Atlanta last week, his representative told TMZ. Those shows were pushed to Thursday, and, although still not feeling well, he performed anyway for a packed Fox Theatre crowd.
After boarding his private plane to fly home, the singer’s condition worsened, and the pilot made an unscheduled stop around 1 a.m. at Quad City International Airport in Moline.
After receiving treatment, Prince was back on the plane three hours later.