Bob Seger announced Tuesday that he will have to postpone upcoming tour dates, including a concert later this month at the Woodlands Pavilion, because of a health issue. The “urgent medical issue” involves his vertebrae, according to a press release. No other details were released.

“I’m so disappointed to have to suspend the tour as the band is on a great roll,” Seger said in a statement. “It’s a privilege to play for our amazing fans. Hoping to be back out on the road very soon.”

Seger and his Silver Bullet Band played the 13th sold out show of their 2017 Runaway Train Tour last Thursday in Pittsburgh.

Rescheduled dates will be announced when available. Tickets sold for concerts that are being rescheduled will be honored at the new dates.