TULSA, Okla. (AP) — A former Air Force senior airman suspected of setting off a pipe bomb outside an Air Force recruiting office in Oklahoma is mentally incompetent to stand trial on federal explosives charges, a judge determined Tuesday.

U.S. Magistrate Judge Frank McCarthy ruled that 28-year-old Benjamin Roden had some type of "mental disease or defect," making him unable to assist in his defense. McCarthy ordered Roden hospitalized at a federal facility for further evaluation "to determine whether there would be a time when he might be considered well enough to stand trial."

Whitney Mauldin...