A gas leak in the pit of a coal mine in central China has left at least nine workers dead and seven others trapped.

The leak occurred on 2 August at the Sanyuandong mine owned by Zhengzhou Coal Industry in Dengfeng, Henan province.

A total of 127 miners were underground at the time of the accident and 111 were lifted to the ground safely.

Over the weekend 24 miners were trapped in a flooded pit in the north-eastern province of Heilongjiang, while 17 others were killed in an explosion at a mine in the northern province of Shanxi.