Authorities have identified two members of an Amish family — a mother and young son - killed Sunday afternoon when a logging truck struck the back of their horse-drawn buggy in southern Venango County.

Mary Troyer, 31, and James Troyer, 10, both of the Clintonville area died in the crash about 3:05 p.m. on Route 208 in Irwin Township, about two miles north of the Butler County line.

Venango County Coroner Christine Rugh pronounced the victims dead at the scene. Both died of multiple blunt force trauma, according to autopsies performed Monday, Rugh said.

Injured in the crash, investigators said, was Troyer's husband, Mahlon, 32, who was driving the buggy, and two other children of the couple, a boy and girl, whose names and ages were not released.

Mahlon Troyer and his daughter both suffered apparent serious injuries, and were flown by medical helicopter to St. Elizabeth Boardman Hospital in Youngstown, Ohio and Children's Hospital in Pittsburgh, respectively. Their conditions were not known.

The injured boy was taken by ambulance to Grove City Medical Center, were he was treated and released.

State police said Richard R. Stanford, 54, of Punxsutawney, who was driving the truck, was traveling east on Route 208 and failed to see the slow-moving buggy in front of him. The eastbound buggy, police said, was straddling the white fog line when the tri-axle Peterbilt truck hit it.

This is an excerpt of an article that will appear in Wednesday's Butler Eagle. Make sure to pick up a copy or subscribe online to read the full article.