Someone on the University of Minnesota Duluth campus carrying what turned out to be a plastic-pellet gun prompted a brief lockdown on Thursday that ended with two teenagers arrested and no one hurt, a school official said.

The incident began shortly after 7:15 a.m. near Kirby Plaza, when two people “walked into the Kirby Plaza Bus Hub, and an alert employee observed that one of them dropped what appeared to be a gun and called 911,” a statement from the school read.

Arrested were a 19-year-old man and a 15-year-old boy, the school said.

Authorities recovered an air-soft pistol, a gun that fires plastic pellets.

Both teens could be charged with disorderly conduct, underage drinking and drug possession, the statement said. Neither are UMD students, said UMD spokeswoman Lori Melton.

Paul Walsh