Plainville Firefighter Ray Moreau was responding to house fire early Sunday morning when he was struck by a piece of equipment, state police said.

Raymond "Ray" Alan Moreau, 60, was working at the scene outside near a fire truck, when a piece of the truck broke off and hit him in the leg, state police said.

The victims had recently moved to Prairie Grove, about 12 miles from the park. A manhunt was underway for a man described as wearing dark clothing and fingerless gloves.

State police identified the victims on Sunday as 43-year-old Clinton David Brink and his 41-year-old wife, Cristen Amanda Brink. In a statement issued on Sunday, the Arkansas State Police said the couple was killed while out hiking with their two daughter, ages 7 and 9, who were not injured in the incident.

Arkansas state police are investigating a double homicide in Devil’s Den State Park and looking for the suspect who is still at large. A 43-year-old man and a 41-year-old woman were found dead on a walking trail about 2:40 p.m. on July 26, state police said. The case is being investigated as a pair of suspected homicides.