Moonbin, a superfamous K-Pop star, has died of suspected suicide, prompting mass mourning from a fiercely loyal fanbase. He was 25.

Moonbin, a member of the South Korean K-pop band Astro, has died at the age of 25, his music label announced on Thursday.

A portrait of Moonbin, a member of boy band Astro, is seen at a funeral home in Seoul, South Korea on April 20, 2023. Reuters via Reuters TV/Daewoung Kim

"On April 19, Astro member Moon Bin unexpectedly left our world and became a star in the sky," the record label, Fantagio, tweeted in Korean on Thursday, according to Sky News.

"Although we cannot compare our sorrow to the grief that the bereaved families are feeling, losing a beloved son and brother, the Astro members, fellow Fantagio artists, company executives, and employees are mourning the deceased in great sadness and shock," the statement said.

The superstar was found unresponsive in his apartment in the Gangnam neighborhood of the capital Seoul, The Guardian reported, citing local media.