Police at the University of Texas Southwestern Medical Center evacuated a building on campus due to the threat of an active shooting Monday.



Officials with the learning hosital said a letter was discovered Monday morning threatening the shooting. No other details about the letter were released.



At 11:15 a.m., the school said no immediate threats had been identified and that the building was evacuated out of an abundance of caution.

In an update just before noon, UTSW officials confirmed no new threats had been identified and that police were continuing to patrol the campus.

Operations returned to normal at about 1 p.m.



No additional information was available.