Accordingo to Business Insider, Yale University's Emergency Management Service has confirmed the presence of a gunman on the school's New Haven, Conn. campus.

An alert was issued after an anonymous tip was received from a payphone. Though many students have gone home for Thanksgiving break, those on campus are urged to seek shelter. We will update with more information as it becomes available.

UPDATE: Authorities are currently combing the campus in search of a suspect.

According to the Boston Globe, the anonymous phone call came from a student who warned that his roommate was headed to campus to shoot people while armed with a long gun. New Haven Police spokesman David Hartman said police later received reports from witnesses of a man with a gun. 

Around 1:45 p.m., another alert went out to faculty and students that police were conducting room searches:

[via Business Insider, Boston Globe and Twitter]