The administrative committee of Luhu Lake and urban management authority have promised to take effective measures to stop the illegal dumping of human waste into the lake, a scenic area in downtown Guangzhou, capital of Guangdong province.

In addition to boosting patrols, authorities have installed more than 70 cameras along the lake, an official from the Luhu Lake administrative committee said.

"The cameras, which cover the entire lake area, will soon be put into operation," said the official surnamed Liu.