Detectives in Minnesota have questioned a doctor who saw the late singer Prince twice in the weeks before he died.
A police warrant has also revealed that Dr Michael Schulenberg prescribed medication to the singer on 20 April - the day before he died.
It does not say what was prescribed or whether Prince took the drugs.
The results of a post-mortem examination of the 57-year-old singer have discounted suicide. A medical examiner said full results could take several weeks.
