Yale University in New Haven, Connecticut, said local police received an anonymous call from a telephone box this morning reporting there was a person with a gun on the campus.
Yale and New Haven Police are currently in the area, the university added.
Yale University in New Haven, Connecticut, has urged students and staff to take shelter after local police received a report of a person on campus with a gun.
"Confirmed report of a person with a gun on/near Old Campus. SHELTER IN PLACE. This is NOT a test", the university website reads.