A 26-year-old woman has died of a strain of bird flu, and another woman is reportedly in serious condition, health authorities in southern China have said.
The two contracted H5N6, a strain of bird flu that has so far only been seen in people in China.
A spokesman at Shenzhen's Centre for Disease Control and Prevention confirmed the death of the local woman on December 30.
A 40-year-old woman, also from Guangdong province, is in serious condition in hospital, the Xinhua News Agency reported.
Six human cases of H5N6 have been reported in total, all in China, since May 2014. The virus has been detected in poultry in China, Lao and Vietnam.
The World Health Organisation said that human cases of bird flu remain uncommon, with sporadic cases occurring following exposure to infected poultry or a contaminated environment.
It says there is no evidence of sustained human-to-human transmission of bird flu.