Upon their arrest, authorities searched the group's backpacks and confiscated seven handguns, three rifles, two grenades, 470 bullets, two packets of a white powder suspected to be heroin, and many other exhibits.

Thai Prime Minister Prayut Chan-o-cha voiced his concerns about national security after the discovery of a cache of military-grade weapons in a swamp in Chachoengsao province, reported Thai media on December 5.