Beijing is cloaked by a thick yellow smog with pollution surging to hazardous levels as a sandstorm sweeps across China's capital.
Buildings are obscured behind an apocalyptic-looking pall of smog.
The city government ordered all schools to cancel outside sport and events and advised those with respiratory diseases not to go out.
The poor air quality was due to a sandstorm from northern Mongolia, state media said, carried south by the wind and reducing visibility in Beijing to less than 1,000 metres.
(Source: AFP)