Maj Kittipum Thinthalang of Thalang Police said officers were called to the scene in front of Baan Lipon School.
“When we arrived the scene we found an injured man sitting in a shop near the road with people helping to dress his wounds,” he said.
The victim was identified as Kittipong Chotipong, 21, who had been stabbed in the chest to a depth of about 3cm. He was taken to Thalang Hospital.
Mr Kittipong he said that he was riding alone. “Three men on a bike cut in front of me and stopped me. Two of them got off the bike and punched me, and one used something to stab me. I ran to the shop nearby.
“I’ve never seen them before,” he added.
Maj Kittipum said, “At this stage, we surmise that they might have had a problem on the road before, which caused the incident.”
Officers are now checking CCTV footage and have called for witnesses to help them identify the attackers.