A false alarm triggered a tactical response at Western Technical College Thursday night.
Authorities responded to the Coleman Center on campus, which is less than a block away from the La Crosse Police Department.
Students were evacuated after someone called police around five o'clock, saying they heard what they thought were gunshots.
Police told News 8 it turned out to be a class popping balloons for a project.
The scene was clear in less than an hour.