Slipknot have been forced to delay their co-headlining summer tour with Marilyn Manson due to frontman Corey Taylor undergoing and “unplanned spinal surgery.”

“Regretfully, I’m sending this to our fans to inform you that we will be postponing the first couple of weeks of our upcoming U.S tour,” he writes on Facebook. “Unfortunately, I had to undergo an unplanned spinal surgery. I am recovering nicely, and all went well! I need a little recovery time before hitting the stage. We will start the summer tour in Nashville on 6/28 and continue as previously scheduled. An update on the rescheduled dates will be available in the next few days. I hope you all understand and thanks for always having my back! Thank you, Corey.”

Taylor issued an update via Twitter after the surgery, revealing that he had broken his neck and didn't know it.

Basically broke my neck a while back & didn't realize it. Had 2 have disc replaced & work on vertebrae. Those 1st shows rescheduled for Aug.

— Jalapeno Throat, LLC (@CoreyTaylorRock) 3 June 2016

Enough w/ the conspiracy theories. I quit smoking b/c I wanted to. I had emergency surgery b/c shit came up during my physical.
Calm.
Down.

— Jalapeno Throat, LLC (@CoreyTaylorRock) 5 June 2016

The postponement will affect the first 12 dates of the tour as per below:

June
9 - Salt Lake City, UT - USANA Amphitheatre
11 - Auburn, WA - White River Amphitheatre
13 - Concord, CA - Concord Pavilion
14 - Inglewood, CA - The Forum
15 - Chula Vista, CA - Sleep Train Amphitheatre
17 - Las Vegas, NV - MGM Grand Hotel & Casino
18 - Phoenix, AZ - Ak-Chin Pavilion
19 - Albuquerque, NM - Isleta Amphitheater
21 - Morrison, CO - Red Rocks Amphitheatre
24 - Austin, TX - Austin 360 Amphitheater
25 - Dallas, TX - Gexa Energy Pavilion
26 - The Woodlands, TX - Cynthia Woods Mitchell Pavilion presented by Huntsman

Shows still scheduled:

June
28 - Nashville, TN - Bridgestone Arena
29 - Atlanta, GA - Aaron’s Amphitheatre at Lakewood

July
1 - West Palm Beach, FL - Perfect Vodka Amphitheatre
2 - Tampa, FL - MIDFLORIDA Credit Union Amphitheatre at the FL State Fairgrounds     
6 - Wantagh, NY - Nikon at Jones Beach Theater
8 - Hartford, CT - Xfinity Theatre
9 - Holmdel, NJ - PNC Bank Arts Center
10 - Hershey, PA - GIANT Center
12 - Cincinnati, OH - Riverbend Music Center
13 - Noblesville, IN - Klipsch Music Center
15 - Oshkosh, WI - Rock USA (Festival Date)
16 - Cadott, WI - Rock Fest (Festival Date)
17 - Bridgeview, IL - Chicago Open Air (Festival Date)
19 - Toronto, ON - Air Canada Centre
20 - Montreal, QC - Bell Centre
21 - Québec, QC - Videotron Centre
23 - Syracuse, NY - Lakeview Amphitheater – Syracuse
24 - Saratoga Springs, NY - Saratoga Performing Arts Center
26 - Bristow, VA - Jiffy Lube Live
27 - Camden, NJ - BB&T Pavilion
29 - Clarkston, MI - DTE Energy Music Theatre
30 - Burgettstown, PA - First Niagara Pavilion

August
2 - Charlotte, NC - PNC Music Pavilion
4 - Maryland Heights, MO - Hollywood Casino Amphitheatre
5 - Des Moines, IA - Wells Fargo Arena