A forensic examination of the body of popular singer Giorgos Mazonakis was expected Friday as investigators sought to determine the circumstances of his death and whether it was connected to a medical procedure at a private clinic in central Athens.

Greek musician Giorgos Mazonakis, 54, died in Athens after a reported cardiac arrest. His official cause of death has not yet been announced.

Greek pop star Giorgos Mazonakis, who also enjoyed a strong following among the Greek diaspora, has died of a heart attack after being rushed to a hospital in Athens. He was 54.