This weekend the Red Hot Chili Peppers had to cancel their appearance at the KROQ Weenie Roast in Irvine, California. The last minute cancellation occurred on Saturday, just before the band were scheduled to take the stage.

The annual event took place at the Irvine Meadows Amphitheatre, it was quickly reported that frontman Kiedis (shown above via Getty) experienced “extreme stomach pain,” this according to a KROQ rep that spoke with Billboard following the announcement. The pain was apparently so bad that Kiedis was immediately taken to a nearby hospital.

“No one’s more disappointed than us that we couldn’t perform tonight. Sending love and a speedy recovery to my brother Anthony,” Chad Smith (drummer) tweeted to his followers and fans.

Following Kiedis’ quick exit, bandmates Flea and Josh Klinghoffer took to the stage to break the news to the crowed.

“We live to rock, we live to fucking dig deep into the depths of our hearts and rock, but unfortunately there’s a medical thing that happened and we needed to deal with it, so we’re unable tonight,” Flea told the audience. “We will play for you very soon, we will play for you like the feral animals that we are, and we’re so sorry.”

The band would have joined fellow rockers Cold War Kids, Panic! at the Disco, Garbage, Tantrums and Fisk at the event. Also appearing on stage this weekend were Blink 182, who made a surprise appearance for fans, Empire of the Sun and the band Weezer.

If you missed the band’s performance, you should be able to see them when they play at the Burbank, California show at the iHeartRadio Theater on May 17th. As of right now that show is still on-schedule, but if you have tickets you should keep a close eye on the band’s social-media accounts in case they are forced to cancel again.

The Chili Peppers have a few other events in May as well, playing at the Columbus, Ohio’s Rock on the Range and another gig on May 29th at Napa, California’s BottleRock. All of those shows are currently still happening, but that could change over the next few days.

The band will also be appearing at a slew of festivals throughout the summer, including the popular Lollapalooza event.