Lou Koller, the longtime frontman of hardcore band Sick of It All, has died after battling adenocarcinoma cancer. News of his death was shared by the band, marking a major loss for fans of the influential New York group.

According to the announcement, Sick of It All confirmed Koller’s death in a social media post on Friday. The update came after public awareness of his fight with adenocarcinoma, a form of cancer that he had been dealing with.

Koller was widely known as the voice of Sick of It All, a band that became a defining name in hardcore music. His death is likely to resonate deeply across the punk and hardcore community, where the group built a lasting reputation over the years.

While only limited details were immediately available, the news has already prompted mourning from listeners who followed Koller’s career and his struggle with cancer. His passing closes an important chapter for Sick of It All and for a scene shaped in part by his presence.