University officials say the briefcase was found in the Sports Center garage Saturday night amid the school's alumni weekend activities. Buildings such as Bender Arena were evacuated, shuttle buses were rerouted and dining services were impacted as authorities investigated. An event featuring three former presidential press secretaries that was to be moderated by NBC's David Gregory also was called off.
District of Columbia police detonated the briefcase and found video equipment inside. The owner of the briefcase later said it had fallen from the top of his car when he was driving away.
University officials say all remaining events for Sunday will take place as planned.
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