Punk rock band Green Day announced Sunday it is postponing the first three shows of its upcoming tour. The bank also called off one show due to an illness that has affected several members of the band and the crew.

Shows at St. Louis, Chicago and Detroit have been postponed and the one in Toronto scheduled for Friday has been cancelled.

“We’re so sad to announce we have to postpone three shows and cancel Toronto. Many of us have been battling this infection for days on end to be ready, and it just got the best of us,” the band said in a statement. Tickets will be refunded, the band added.

The band was set to go on tour to promote its latest Revolution Radio album that comes out on Oct. 7. The Oakland trio returned in August with their first single after nearly four years. “Bang Bang” is the first track off Revolution Radio and was written from the perspective of a mass shooter. The new album is “a collection of songs about the chaotic state of America in 2016.”

Green Day’s lead vocalist and guitarist Billie Joe Armstrong told Rolling Stone: “These songs were written before this presidential election. I use a lot of metaphor, and I blow things out, as any good punk rocker should. And it was interesting to see how songs like ‘Bang Bang’ and ‘Say Goodbye’ went from metaphor to literal, and that’s the part that was tripping me out. It was almost, kind of like, predicting the future, in a way.”

Green Day Rock Hall of fame (Left to right) Inductees Tre Cool, Billie Joe Armstrong and Mike Dirnt of Green Day speak onstage during the 30th Annual Rock And Roll Hall Of Fame Induction Ceremony at Public Hall in Cleveland, Ohio, April 18, 2015. Photo: MIKE COPPOLA/GETTY IMAGES