Windham police have charged three teenagers, one of whom is 18, with criminal use of explosives, after several homemade bombs were detonated.

Police charged Travis E. Carignan of Westbrook and two others this afternoon with felony charges after a series of seven detonations. Nobody was hurt but two mailboxes were damaged.

Windham police and the state Fire Marshal’s Office are continuing to investigate.

Police say the bombs were made from toilet bowl cleaner and other household materials based on instructions found on the Internet. The suspects were fortunate their hands or eyes were not injured, police said.

Police say the bombs were detonated in different sections of town, including Lazy Acres Lane, Highland Cliff Road, Webb Road and Covered Bridge Road.