Yale University. (Photo: www.admissions.yale.edu)
Text alerts that Yale students received after reports of a gunman on or near campus.
NEW HAVEN, Conn. (USA TODAY/AP) - Yale University ordered students and staff to "shelter in place" Monday after an anonymous caller told police that his roommate wanted to shoot up the school and was heading to the main campus with a rifle, according to police.
The university, located in New Haven, Conn., issued its lockdown order on its website at 10:17 a.m. ET.
Police say the tip was called in from a phone booth near campus.
The caller said his roommate had a long gun, according to police spokesman Officer David Hartman. The caller, who did not identify himself as a Yale student, stayed on the phone only a few seconds.
Hartman said "several" witnesses later told police they saw someone with a rifle or other long gun on the loose.
SWAT teams were dispatched in and around the campus and quickly blocked off several streets.
As of 12:54 p.m. ET, the university website said the lockdown remained in place, but noted that there was no additional information regarding a possible gunman.
The university's initial announcement issued at 10:17 a.m. ET said: "Confirmed report of a person with gun on/near Old Campus. Shelter in place.This is NOT a test."
Although the university referred to a "confirmed report," authorities, at this point, say there have been no confirmations or sightings of the person.
The announcement was also made through the loudspeaker on campus, the Register reports.
"Out of an abundance of caution, Police will be doing a room to room search starting with the residential college areas," the university announced on its website. "When they knock on your door, a Yale police officer will slip their Yale ID under the door. Please cooperate. In some cases, police may use keys, but they will identify themselves. Shelter in Place continues."
Many students have already left campus for the Thanksgiving holiday.