Two T-shirts ID'd with bomb found at Spokane's MLK Day parade

Federal investigators indicated Friday they'd made progress in identifying whoever left a bomb in Spokane on Monday along the planned route of the Martin Luther King Jr. Day march.

"We've obtained quite a bit of clarity" as to the identity of those believed to be responsible, said Frank Harrill, special agent in charge of the Spokane office of the FBI. "But we still have a lot of work ahead of us."

Investigators sent the bomb to the FBI lab in Quantico, Va. Harrill has indicated evidence from that analysis may be needed before investigators levy charges against any potential suspects.

The two T-shirts found with a bomb are from nearby Stevens County.

One was distributed last year at the "Relay for Life" in Colville. The second, with the words "Treasure Island Spring 2009" on the front, was reportedly from a 2009 theater production in Chewelah.

Material from The Associated Press and The Spokesman-

Review was used in this report.