Watch: Why rescuers fear new barrier lake could cause another Nepal-Tibet flood

To play this video you need to enable JavaScript in your browser. China has warned there is a high risk that a lake which formed after the recent landslide near the Nepal-Tibet border may breach its banks, causing a second flood downstream. The warning comes after Wednesday's deadly flash flood in the same area which scientists say was triggered by the collapse of a mountain glacier into a river. China correspondent Laura Bicker explains. Read more: 'High risk' of lake breaching and causing second flood, warns China Updates from your News topics will appear in My News and in a collection on the News homepage .