A bomb exploded on the railway track near Maruebo station in Rangae district on Monday morning, injuring two rangers and halting two local train services.
The Maruebo station master reported the 6.30am explosion damaged the track and some sleepers at a switching point, the State Railway of Thailand (SRT) reported.
Security authorities said two rangers were hurt and were taken to the district hospital in Rangae.
The station master’s name was not provided.
The bomb forced the rescheduling of two trains. Train No.448 from Sungai Kolok to Surat Thani was terminated at Tanyongmat in Rangae and train, No.453 from Yala to Sungai Kolok was halted at Reuso.
The SRT said it was discussing the situation with security agencies before deciding when to resume normal services. A repair gang was fixing the tracks.
It was the second attack on the same line in Rangae district in a week. Residents informed rangers patrolling the tracks last Tuesday that 13 bolts and eight sleepers were missing near another station.
Fourth Army Region commander Lt Gen Norathip Phoynok has instructed all army units to remain vigilant against further attacks.