investigators are trying to figure out what caused an alarm to go off at a manufacturing lab at the university of texas at arlington. the building was immediately evacuated at around 10:00 last night. no one was injured. several chemicals are micked in the facility located on south cooper. >>>

right now on the university of texas at arlington campus. hazardous materials crews evacuated the nano fab facility on south cooper. >> this is a live picture you're looking at. you can see crews gathered outside the building there. police say a gas alarm sounded in the building and it was evacuated as a precaution. the building is home to several labs where chemicals are mixed. we understand no one was hurt. >> we'll have an update on that at 5:00 in the morning on nbc >>