SAN FRANCISCO (CBS/AP) — A spokesman for the Red Hot Chili Peppers says the band canceled an appearance at a California radio station’s annual concert after lead singer Anthony Kiedis was hospitalized with intestinal flu.

Brian Bumbery told The Associated Press on Sunday that the 53-year-old Kiedis is expected to make a full recovery.

READ MORE: San Jose Stoners Find Ways To Celebrate 4/20, Pandemic-Style

Bassist Flea told the crowd Saturday in Orange County that the Chili Peppers would be unable to perform.

The band was scheduled to headline KROQ’s Weenie Roast concert. Also on the bill at Irvine Meadows Amphitheatre were Weezer and Empire of the Sun.

READ MORE: Hope, Skepticism: Oaklanders Share Of Feelings About Guilty Verdict In George Floyd Murder Trial

Peppers drummer Chad Smith tweeted: “No one’s more disappointed than us that we couldn’t perform tonight. Sending love and a speedy recovery to my brother Anthony.”

Bumbery says the Chili Peppers will postpone a concert for iHeart Radio scheduled for Tuesday in Burbank, California.

There is no word if the band’s show at BottleRock will be affected.

MORE NEWS: Plan To Let CA Politicians See Names On Recall Petitions Won't Move Forward

© Copyright 2016 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.