A TJC spokesman tells KFXK gas has been shut off to the busted line.
As a precaution, all classes that were scheduled for today in the Pirtle Technology Building have been canceled.
It's expected to take 2 to 2 1/2 hours to repair the gas line.
Utility crews on the Tyler Junior College campus struck a gas line Monday morning.
Faculty and staff evacuated the nearby Pirtle Technology Building, about 150 people were inside.
Officials tell KFXK crews hit the gas line when they were attempting to replace an electrical line.
Oncor is on the scene, and is currently searching for the shut off valve.
No injuries have been reported.