The shooting between the two rival groups while they were splashing water in a Songkran celebration, resulted in the death of Jack Yangthavorn and serious injury to Saran Sabfukiat.
Police reportedly collected about 40 spent shells from shotguns, and 9mm and M16 firearms at the scene.
The three in police custody were Chaichana Wiriyabud, 20, Tum Mekhalai, 27 and Sompong Phrom-ngam, 36.
While the two former men where summoned, Sompong turned himself in to police |and all of them maintained |their innocence, claiming they were playing with water at the scene, but didn’t shoot the victims.
Police were now hunting for the remaining four suspects.