Three teenagers were among four people killed Thursday afternoon in a northwest Georgia wreck involving a pickup truck and a riding lawnmower.

The wreck happened on Old CCC Camp Road in Murray County, according to the Georgia State Patrol.

Investigators said a 2006 Nissan Titan XE pickup truck was traveling at a high rate of speed when the 17-year-old driver lost control in a curve.

The truck overturned on top of Bryan Bartley, who was mowing his lawn.

GSP spokeswoman Franka Young said Bartley, 57, was killed, along with the pickup driver, River Sosebee, and backseat passengers Joshua Roberts, 17, and Chelsie Hullender, 18.

The front seat teenage passenger in the truck, 18-year-old Alexis Pinson, was airlifted to Erlanger Hospital in Chattanooga. Her condition was not available Friday.

Young said all of those killed were from Chatsworth.