Relient K memebers John Warne (bass guitar), Jon Schneck (guitar) and Ethan Luck (drums) announced recently that they will not be touring with Relient K on their upcoming U.S. Tour dates.  

Here is what they wrote on the bands official Facebook page:
"To all the amazing fans of RK:
It is with sadness that we write you to say that we will not be touring with Relient K on the upcoming tour dates. This will be the first tour that the Jo(h)n's have missed in over eight years, and the first that Ethan has missed since he joined the band in 2008. We will miss seeing you all on the road this year, and we want to thank you for always being there for us. Hope to see you soon.
John Warne, Jon Schneck, Ethan Luck."

With not many details released, no one is for sure if this is a permanent split from the band members or just a temporary move.  

An interesting line up change is Zac Farro, ex-Paramore drummer, playing drums for Relint K on their recent Australia tour dates.  

Relient K have just released news though that Dan Gartley and Tom Breyfogle will be performing on bass and drums respectively.  So Zac Farro was only a temporary fill in and will not be on the U.S. Tour dates.     

Ethan Luck, formerly of The Dingees and Supertones, has been Relient K's touring drummer since 2008.  Luck is on tour doing tech work with Cold War Kids right now.  No official word on if Luck is permanently done playing with Relient K..  

At last night's Relient K show, Matt Thiessen (singer) said that even though Collapsible Lung was supposed to be released "next week," it's now scheduled for a July release date.

To see full U.S. tour dates go to their website here.