A group of people suspected of attempting to rob motorcycles in Tak province escaped on Friday before soldiers could apprehend them.
Security officials found six motorcycles that they were attempting to illegally transport to Myanmar by boat.
The incident happened in Mae Ramat district. The soldiers reportedly saw the suspects trying to travel by boats with the motorbikes from the Thai border to Myanmar.
When officials tried to corner them, the suspects reportedly jumped into the river and swam towards Myanmar.
The soldiers later checked the motorcycles and found no evidence of possession in the system. They suspect that the persons were auto thieves.
Separately, soldiers in the Mae Sot district of Tak found two people -- a Thai and a Myanmar national -- allegedly illegally crossing the border.