At about 11 a.m., Yale University confirmed reports of a gunman on the school's Old Campus, where freshman dorms are located. A Shelter in Place alert was issued, and a SWAT Team quickly arrived on the scene, closing a nearby street. UPDATE 5:00 PM: New Haven police now believe the report was a hoax.

As of a few minutes ago, the campus-wide lockdown has been lifted. The original post is below.

UPDATE 2:03 PM: Police are now conducting a room-to-room search in the university's residential buildings. "We don't have a suspect," New Haven Police spokesman Dave Hartman said. "There's nothing tangible."

There are still no reports of an actual shooting or any injuries. The initial report of a gunman came from a phone booth near campus, according to Yale's emergency board:

New Haven Police have received an anonymous call from a phone booth in the 300 block of Columbus Avenue (between Howard Avenue and Hallock Street) reporting a person on the Yale campus with a gun.

The caller reportedly told police that his roommate was headed to campus with gun. All students are currently on Thanksgiving break through December 2.