The Cortland County Sheriff's office is investigating an incident in which a homemade explosive device damaged a mailbox.

The incident on Telephone Road in the Town of Cincinnatus was reported at around 7:00 a.m. April 17th.

Investigators are cautioning residents to be very alert when checking their mail. Anyone seeing any suspicious items in or near their mailbox should alert authorities.

It's not known if the April 17th incident was an isolated act.  Anyone with information about that Telegraph Road incident should contact the Cortland County Sheriff's Department at (607) 753-3311.