South Korean singer Wheesung, who also went by the stage name Realslow, has died at his home in Seoul, reports say.

The K-pop sensation — real name Choi Whee-sung — was discovered dead in his Gwangjin-gu, Seoul, home around 6:30 p.m. on Monday, March 10, The New York Times confirmed. Fire officials told the outlet that Wheesung, who struggled with drug abuse, was in a state of cardiac arrest when he was found.

South Korean singer Wheesung has been found dead at his home in Seoul, CNN affiliate YTN reported on Monday. Police are still investigating the cause of the 43-year-old’s death and have requested an autopsy from the National Forensic Service,