GRAND COUNTY, Colo. (CBS4) – Local and federal authorities are working together to catch thieves targeting mailboxes in rural Summit and Grand Counties.

CBS4 has learned several credit cards were used at the Walmart in Frisco on the same day mail was stolen from a community mailbox in the Blue Valley Acres neighborhood in Grand County. More reports of missing mail were filed in nearby Heeney, Colorado.

The recent rash of mail thefts has the U.S. Postal Inspector, along with local sheriff investigators, trying to find out who is responsible. Read more at CBS4