"We are so sorry to say Kings of Leon are canceling their entire US tour due to Caleb Followill suffering from vocal issues and exhaustion," the band said in a statement posted on their website Monday. "The band is devastated, but in order to give their fans the shows they deserve, they need to take this break."
The news comes three days after Caleb Followill walked off the stage mid-show in Dallas after telling the audience it was too hot and that his voice was suffering for it. At one point he told the audience he was ill and would be back after taking a few minutes to recover, but he never returned.
His abrupt departure was blamed on heat exhaustion and dehydration. But on Twitter, members of the family band hinted at other problems.
"Dallas, I cannot begin to tell you how sorry I am. There are internal sicknesses & problems that have needed to be addressed. No words," Jared Followill tweeted.
Members of the Nashville-based band had initally announced they would return to the Lone Star state to make up the recent cancellations in Dallas and Houston. However, all canceled U.s. shows will not be rescheduled due to the band's international tour schedule, Monday's statement went on to say.
The band will return to the road in Vancouver, British Columbia, on Sept. 28. Tickets for the more than 20 remaining U.S. concerts will be fully refunded.
The Followills took to Twitter to apologize and address break-up rumors.
Drummer Nathan Followill tweeted, "Bummed about the tour not happening. So sorry 4 all the fans. We just need some rest. Thanks 4 understanding. WE ARE NOT BREAKING UP!"
While bassist Jared Followill tweeted,"Utterly depressed. It's completely out of my hands. Family has to come 1st. If bass solos & backing vocals were more popular, I'd be there." But then he tried to lighten the mood.
"Don't jump to conclusions guys," he wrote in a subsequent tweet. "We're not breaking up. BRB. Just got a text from Nathan..... Ummm.... Eesh. So about what I just said....... "
Then he posted: "Kidding! Kidding! Not breaking up."
The Associated Press contributed to this report.