SUSQUEHANNA COUNTY, Pa. -- A Pennsylvania man was killed after his truck went off the road in Harmony Township.

State Police say Raymond Kilmer, 64, of Thompson, lost control on State Route 171 Thursday afternoon, crashing into a pair of mailboxes. Kilmer's vehicle then crossed the road and hit an embankment.

Investigators do not yet know what caused him to lose control, but they as Kilmer was not wearing a seatbelt at the time.

The investigation is ongoing.