A major gas line leak at 18th Street and Colorado Avenue on the University of Colorado at Boulder campus caused the evacuation of 12 campus buildings Wednesday morning. No injuries were reported, according to CU police. The leak was reported about 9:35 a.m. Buildings were evacuated by building proctors and campus police officers. Affected buildings were Muenzinger Psychology, Ketchum Arts and Sciences, Hunter Science, Duane Physics, Environmental Design, Fine Arts, JILA, Music, Cristol Chemistry and Biochemistry, MCD Biology, Ramaley and Telecommunications.