Three men were arrested in Hong Kong on Thursday night after police uncovered a small arsenal of weapons in the countryside, seizing petrol bombs, ammunition and arrows.Officers swooped on a small house on a hillside near the Leaping Dragon Walk hiking trail in eastern Hong Kong Island and found the weapons along with rods and flammable material.Police bomb disposal officers were also deployed.A hooded suspect was later taken down the hill along the trail at 10.30pm, while a second man was…