Police in Grand Forks say those responsible for several downtown fires over the weekend could face arson charges.
No arrests have been made and police are still searching for suspects.
Police say they are working on a couple of leads.
Authorities responded to three separate fires in the early morning hours on Sunday.
Debris was set on fire in an alleyway, a dumpster and near a house.
Neighbors spotted the fire and pounded on the door of the house to get everyone out.
No one was hurt.