Local police are "investigating security implications" after assault rifles, explosives, grenades and anti-personnel mines were found at the man's home, near the beach resort of Pattaya. PATTAYA: Thai police are investigating a vast arsenal of military-grade weapons - including assault rifles, explosives, grenades and anti-personnel mines - found at the home of a foreign man, authorities said on Saturday (May 9). Two M16 assault rifles, hundreds of rounds of ammunition, Russian landmines,