Pol Lt Anukul Chaisuwan, of Sungai Padi police station, said Saifudin Salae, 17, and Iraham Ramae, 16, were returning home on a motorcycle when they were shot by attackers hiding by the side of Sungai Padi - Sako road near Ban Doha in tambon Riko. The ambush occurred about 11.30pm.
Saifudin was hit twice in the left arm. Iraham was hit in the left rib cage and seriously injured.
The two were taken to the district hospital by other people passing by on a pick-up truck.
Police were investigating.