The FBI ordered the evacuation of four Ohio State University buildings Tuesday morning after a bomb threat alleged explosives had been placed in those buildings. The university was informed of the anonymous threat at 8:19am and by 8:41am, the campus-wide security alert system, known as the Buckeye Alert System, was activated. Neighbouring streets were also closed off. No word yet on whether any explosives were found. Campus officials say the evacuation was orderly.