An 84-year-old man was killed in Ratchaburi when he was hit by a pickup truck that then dragged his body for about 10 kilometres along the road.

The driver later told police he did not stop because he panicked after hitting the man. 

The accident occurred about 6am on Sunday in Photharam district. The elderly victim was identified as Bunchu Aramkong.

His 36-year-old granddaughter said he normally went outside in the early morning to sweep the ground in front of the house.

She heard the sound of a car and something being hit on Sunday morning. She rushed outside to see what happened and saw only one of her grandfather's sandals on the road, and a pickup disappearing in the distance.

She and other relatives then drove after the pickup, shouting at the driver to stop, but he did not. About 10 kilometres from their home, they found Bunchu's body on the road. He had severe injuries to his head and his body from being dragged along the road by the vehicle.

Police found the pickup parked in front of a temple in tambon Tha Chumpon. 

The driver, Paeng Somjai, 61, admitted he had hit the old man and then tried to escape. 

He faces charges of reckless driving causing death and hit-and-run.