Three high school students who thought they were being funny by sticking a bag of poop in a Sandy, Utah 7-Eleven microwave and cooking it for 10 minutes have been arrested.

Earlier this week, police released surveillance video of three teens who walked into the convenience store near 2200 East and 9400 South, took out a one-gallon plastic bag with human feces inside and put it into the microwave while the clerk wasn’t looking.

The boys left the store, and the clerk figured out what had happened when a foul stench filled the building. The store had to be closed temporarily because of the odor.

Sandy police Sgt. Victor Quezada said the surveillance video was broadcast by local news stations, investigators received numerous tips from callers, and that on Wednesday morning, five high school students were greeted by police as they arrived for school in the morning. Two of the boys eventually were released, while the other three, two aged 16 and a 17-year-old, were arrested for investigation of third-degree felony criminal mischief.

The 7-Eleven figured out the video surveillance thing, but USDA says it’s too complicated for slaughterhouses.