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A four-hour Yale University lockdown that included a room-to-room residence hall search by police and SWAT teams ended safely Monday. Yale officials first told students there may be a threat to safety via text message at 10:17 a.m. after an anonymous male caller said his roommate was heading to campus with a gun and intent to shoot, police said. About a half-hour later, after callers reported seeing a gunman on campus, the lockdown began and students were told to shelter in place. A few minutes before 5 p.m., Yale reported via text message and Twitter that the lockdown had been fully lifted. By the end of the day, New Haven police were beginning to doubt the accuracy of the initial report, according to the Hartford Courant, saying the caller sounded "confused" and they were reviewing security footage to determine whether witnesses who corroborated the report might have spotted armed police rather than a gunman.
