Grand Forks police are investigating several reports of US mail being stolen from residential mailboxes.
Police have received three reports so far.
Sergeant Mike Jennings said it appears the thefts happened in the late night and early morning hours.
"We will be working with the US Postal Inspection Service, to attempt to identify a suspect," Jennings said.
Two suspect vehicle descriptions have been provided. One is a dark SUV, the other is a white 4 door sedan.