Police suspect the attack, which took place at 2.10am in Tambon Reu So was part of ongoing unrest in the region.
Reu So police and security officers rushed to the scene where they found the bullet-ridden bodies of Muhammada Sahoh, 29 and Masoloh Deeyoh, 30, in the plantation.
The third victim Ayup Sahoh, 28, who sustained gunshot wounds to his leg was rushed to Reu Soh Hospital before police arrived. The three men, who are related, were going to tap rubber when the gunmen opened fire.