(Newser) – Police arrested four 18-year-olds from Riverton, Utah—including Miss Riverton herself—on Saturday, on suspicion that they'd been driving around chucking makeshift explosives out their car's window. Kendra McKenzie Gill, who was named Miss Riverton in June, Bryce Christopher Stone, and two others are still being held in jail on suspicion of detonating an incendiary device, a class three felony, the Salt Lake Tribune reports. Police started getting calls late on Friday that people were throwing bombs out of a dark-colored car with a dented front bumper; witnesses told cops that Stone drives a similar car.

There were nine total explosions in all, targeting two homes and several individuals. Stone's ex-girlfriend lived in one of those homes, and when police picked up Stone he named the other three. He characterized the caper as "pranking" people with fireworks. The bombs were made of plastic water bottles, aluminum foil, and a "chemical substance." Gill was set to compete in the Miss Utah pageant, notes Huffington Post; the South Valley Journal outlines her decidedly un-explosive Miss Riverton platform, "Fit to be you." (Read more Utah stories.)

