The rapid population growth that resulted from the booming economy led to several social problems, chiefly the inadequate sanitation and public health facilities, as well as rampant crime. The latter was brought about by an influx of Chinese immigrants, which led to the formation of feuding triads and secret societies. Turf wars between the triads worsened, and when the Straits Settlements authorities attempted to put a stop to the triad activities in 1857, the Chinese triads came into conflict against the British-led police force as well. This culminated in the Penang Riots of 1867 in the streets of George Town, when the Kean Teik Tong, led by Khoo Thean Teik and the Red Flag, clashed against the alliance of the Ghee Hin Kongsi and the White Flag. The resulting civil unrest lasted for 10 days, before the turf war was eventually quelled by the Straits Settlements authorities under newly appointed Lieutenant-Governor Edward Anson, who were assisted by European residents and reinforcements from Singapore.