Duncan Sheik, the Tony-winning composer of Broadway's Spring Awakening and the singer behind the 1996 hit "Barely Breathing," has died in Manhattan at 56, the New York Times reports. According to Sheik's mother, the cause of death was cardiac arrest.

Earlier this week, reports said the musician was in critical but stable condition following an unspecified health issue.

Sheik was born Duncan Scott Sheik on November 18, 1969, in Glen Ridge, New Jersey. His first single, the pop-rock track "Barely Breathing," became a major hit for the young singer-songwriter, peaking at No. 16 on the Billboard Hot 100 and remaining on the chart for 55 weeks. The song later earned a Grammy nomination for Best Male Pop Vocal Performance.

After releasing two more studio albums, Sheik composed the musical Spring Awakening. The show brought him Best Original Score and Best Orchestrations at the Tony Awards, along with a Grammy for Best Musical Show Album.

His most recent album, Claptrap, was released in 2022. It now stands as the final record from a career that moved from chart pop to the top of American musical theatre.