Tha Uthane district chief Phumisak Khampu named them as Weerachai Sukphuwong, 26 and Saenchai Wongsurin, 26.
The district chief said the two suspects were stopped at a road checkpoint while driving their drug-laden pickup on the Ban None Sawan-Ban Nam Kaew road.
They admitted that they were given Bt50,000 to take the drugs from the river to leave by a roadside in Tha Uthane to be picked up later.