State Troopers are investigating following a third fatal crash Monday in Columbiana County.

The single-car semi-truck crash happened in Wellsville just before 2 p.m. on the curve along Route 39 and Boyd Road.

The driver of the semi, 59-year-old Darrell Young of Clover, Pennsylvania, was killed in the crash after the truck rolled onto its side.

Investigators say speed is believed to be a factor in the crash.

Young was not wearing his seat belt. Drugs and alcohol are not suspected in the crash.

Two other fatal crashes happened earlier Monday in the county.

The first occurred around 5 a.m. in Madison Township after 34-year-old Tress Wiley was thrown from his car that struck an embankment.

State Troopers also found the victim of an ATV crash around noon in Middletown Township. They identified him as 24-year-old Elijah Kaufman of Rogers.