SPOKANE, Wash. -

A Clarkston man has pleaded guilty in federal court in Spokane to manufacturing an explosive device and attempting to provide material assistance to terrorists. Joseph J. Brice, 22, faces up to 15 years in federal prison when sentenced.

A federal investigation showed Brice posted violent videos on YouTube in 2010 and 2011. Brice also posted a video honoring Oklahoma City bomber Timothy McVeigh.

Authorities began to investigate Brice after he suffered life-threatening injuries from a bomb he made that exploded on April 18, 2010. Federal investigators later learned that Brice posted videos advocating suicide bombings.

Brice did not explain his actions Tuesday in court.