The Beijing Municipal Environmental Protection Bureau has launched an investigation after media reported that a landfill near Miyun Reservoir is threatening the city's main source of drinking water.

The bureau said on its micro blog on Sunday that the results of the investigation will be released soon.

The landfill, with an estimated area of 3,000 square meters, is full of unsorted waste such as batteries, dead chickens and medicine bottles.

The head of Bulaotun township said on Saturday that all the garbage will be cleaned in 15 days but denied that the waste has been dumped there for three years, as local villagers had said earlier.