A bomb squad was called to a Goodwill store in Albuquerque, New Mexico Thursday after a gun, ammunition, a grenade and marijuana was found in a collection box. Local news station KRQE reports that the staff was evacuated as the bomb squad inspected the grenade, which turned out to be inert and harmless

The charity says that it's not uncommon for them to receive weapons as donations, which they turn over to the police. The bomb squad says they're going to use the grenade for training exercises. It is unknown who donated the guns or the grenade.