Bob Seger has been forced to postpone all 19 dates of his current 2017 Runaway Train tour for an undisclosed amount of time due to an "urgent medical issue concerning his vertebrae."

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

No further details on Seger's medical issue are known at this time. However, when he first announced the postponement of this past Saturday's scheduled show in Columbus, Ohio, it was reported that the singer had "a pinched vertebrae in his neck and is not able to perform tonight’s show.”

The Runaway Train tour was announced back in May with a video featuring the words "one last time," prompting speculation that this will be Seger's farewell tour. But he has not formally stated that this is the case.

According to today's statement, rescheduled dates will be announced when available. Tickets sold for concerts that are being rescheduled will be honored at the new dates.

Seger recently revealed that he will be releasing a new album, I Knew You When, on Nov. 17.

Postponed Bob Seger 2017 Runaway Train Tour Dates

Sep 30 - Columbus, OH Nationwide Arena

Oct 5 - Greenville, SC, Bon Secours Wellness Arena

Oct 7 - Atlanta, GA, Infinite Energy Arena

Oct 10 - Des Moines, IA, Wells Fargo Arena

Oct 12 - St. Louis, MO, Scottrade Center

Oct 14 - Kansas City, MO, Sprint Center

Oct 19 - The Woodlands, TX, Cynthia Woods Mitchell Pavilion

Oct 21 - Frisco, TX, Ford Center at The Star

Oct 24 - Austin, TX, Frank Erwin Center

Oct 26 - Denver, CO, Pepsi Center

Oct 28 - Phoenix, AZ, Talking Stick Resort Arena

Nov 2 - Oakland, CA, Oracle Arena

Nov 4 - Inglewood, CA, The Forum

Nov 7 - Boise, ID, Ford Center

Nov 9 - Portland, OR, Moda Center

Nov 11 - Seattle, WA, KeyArena

Nov 13 - Billings, MT, Rimrock Auto Arena

Nov 15 - St. Paul, MN, XCEL Energy Center

Nov 17 - Chicago, IL, Allstate Arena