The Bangkok Post reports

Two men and a woman were arrested and over 500kg of compressed marijuana seized at a checkpoint in Nam Phong district on Thursday.

Highway police manning the checkpoint on Mittraparb Road signalled a suspected pickup truck with Songkhla licence plates for a search on Thursday afternoon.

The driver, who was alone in the vehicle, acted suspiciously when asked by the officers, said Pol Col Apichart Phothichan, chief of highway police sub-division 4.

The police searched his vehicle and found many fertiliser sacks containing compressed marijuana in the back of the pickup truck. There were sacks containing coconut coir on top of marijuana.

A total of 510 bars of compressed marijuana, weighing 510kg were seized. The drugs had a face value of about 7.6 million baht, said Pol Col Apichart.