A third man has died of pneumonic plague in north-western China where a town of more than 10,000 people has been sealed off, officials say.
The 64-year-old man was a neighbour of the first two people to die from the plague in Ziketan in Qinghai Province.
Police have set up checkpoints around Ziketan, as medics are disinfecting the area and killing rats and insects.
Pneumonic plague, which attacks the lungs, can spread from person to person or from animals to people.
WHO watching China plague cases 'closely'
A spokeswoman for the World Health Organization, Vivian Tan, earlier said an outbreak such as this was always a concern, but praised the Chinese for reacting quickly and for getting the situation under control.
A BBC correspondent in Beijing, Michael Bristow, says that unlike in the past the authorities are being very open about this outbreak.
Bubonic plague is spread by flea bites or contact with infected animals
Pneumonic plague, caused by the same bacterium, can spread between humans
Pneumonic plague, affecting the lungs, can kill within 24 hours
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