Rock band Radiohead has admitted it was hacked last week, with attackers making off with unreleased material and reportedly demanding a ransom payment of $150,000 in exchange for not releasing it.

According to a Facebook post by guitarist Jonny Greenwood, the hackers stole lead singer Thom Yorke’s minidisk archive from around the time of the 1997 Radiohead album OK Computer.

The hacker who was demanding $150,000 from the band made good on the ransom threat by releasing the music two days earlier on the dark web, according to cybersecurity firm Sixgill.