Police in Tucson, Arizona, said pranksters convinced employees at a fast food restaurant to smash windows by pretending to be a fire-suppression company.

The employees received a call around 1 a.m. on Tuesday saying that the gas levels were high and that the building needed to be evacuated. The prankster also convinced employees to smash every window of the building to prevent it from exploding.

Police say the call was illegal because it resulted in criminal damage.

Tucson police are investigating the prank.