University of Central Florida police block off a street near the Tower 1 dorm, tall building center, after explosive devices were found by authorities investigating the apparent suicide of a college student in the dorm, Monday, March 18, 2013, in Orlando, Fla. Hundreds of students were evacuated, though the school said there was no immediate threat. (AP Photo/John Raoux)

University of Central Florida police block off a street near the Tower 1 dorm after explosive devices were found while investigating a death in the dorm, Monday, March 18, 2013, in Orlando, Fla. Hundreds of students were evacuated, though the school said there was no immediate threat. (AP Photo/John Raoux)

University of Central Florida students wait outside the college sports arena after explosive devices were found in a nearby dorm, Monday, March 18, 2013, in Orlando, Fla. The campus was closed and classes were postponed until noon. (AP Photo/John Raoux)

University of Central Florida police block off a street near the Tower 1 dorm, tall building center, after explosive devices were found by authorities investigating the apparent suicide of a college student in the dorm, Monday, March 18, 2013, in Orlando, Fla. Hundreds of students were evacuated, though the school said there was no immediate threat. (AP Photo/John Raoux)

Various police agencies are seen during an investigation at the University of Central Florida, Monday, March 18, 2013, in Orlando, Fla., after explosive devices were found by authorities investigating the apparent suicide of a college student in the dorm. Hundreds of students were evacuated, though the school said there was no immediate threat. (AP Photo/John Raoux)