Four masked men fled with $10,000 in cash from a mahjong club in Kwai Chung. A female employee of the club hid in one of the rooms when she discovered the raiders, who were armed with knives, climbing into the second-floor premises in Wo Yi Hop Road at 5am. Police said the 49-year-old staff member called police after the robbers fled. Officers said the gang left a toy gun and two knives at the scene.