MONSON — Police are investigating a fatal accident on a state highway in Piscataquis County.

Police say 37-year-old Travis Butler of St. Albans was fatally injured when his dump truck was struck by the trailer of a tractor-trailer that jackknifed on a sharp curve on Route 15 in Monson, south of Greenville. The accident happened around 12:30 p.m. Thursday.

Guy Dow of the Piscataquis County Sheriff’s Department told the Bangor Daily News that the tractor-trailer’s empty trailer tipped sideways and collided with the dump truck, crushing the cab.

Butler died Thursday night at Eastern Maine Medical Center in Bangor.

No charges have been filed.