GREELEY, Colo. -

Authorities in two northern Colorado counties say vandals used explosives to blow up people's mailboxes.

KMGH-TV reports Wednesday that three mailboxes have been destroyed in Larimer County, and four in Weld County.
In Larimer County, fireworks wrapped with duct tape were used in at least one case. Sheriff officials in Weld County say they recovered a similar device in one case.
No one was injured in the explosions, which happened Saturday and Sunday.
Anyone with information is asked to contact the Weld County Sheriff's Office at 970-356-4015 or the Larimer County Sheriff's Office at 970-416-1985.