A series of strong earthquakes has struck China's western Qinghai province.
Officials say at least 400 people have been killed, and 10,000 others have been injured. It is not known how many are still buried.
The earthquake, measured at magnitude 6.9, hit the remote county of Yushu near the Tibetan border, in the south of mountainous Qinghai.
The BBC's correspondent in Beijing is Michael Bristow.
Diana Dodd works with the international charity ROKPA, which operates in the town of Jiegu, close to the earthquake epicentre.
She has been in touch with people there in the hours since the earthquake struck.
How quickly can tents, food and medicine reach the stricken area?
Francis Markus of the International Committee of the Red Cross is in Chengdu, in the neighbouring province of Sichuan.
First broadcast 14 April 2010
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