Kings of Leon have reportedly axed the remainder of their U.S. tour dates following a widely publicized incident in Dallas, Texas. The band was forced to cut the show short after frontman Caleb Followill unexpectedly walked off stage citing overheating and nausea. There are rumors that the band has coaxed Caleb to seek rehab treatment for a drinking problem that he’s supposedly been battling for a long time, said a source to US Weekly. However, a representative of the band insists the reason for the cancellations are due to the stress on Caleb’s voice. “The reason for the cancellation of the tour is Caleb is under doctor’s orders for vocal rest,” said the representative. “They feel terrible about cancelling. They look forward to getting back on the road at the end of September.” Thus far no rescheduled dates have been announced. The band is currently set to kick off another leg of their tour on September 28 in Vancouver, British Columbia, Canada.