Xi's personal rescue call shows size of Tibet devastationpublished at 13:54 BST
Laura Bicker
China correspondent
Image source, ReutersCCTV footage shows the moment a flash flood slams into the Gyirong border crossing
There are significant casualties in Tibet after a devastating mudslide, according to Chinese state media. A number of people are also reported missing.
Footage from a surveillance camera at the border appears to show buildings being completely submerged by mud and water.
It is always difficult in China to get an idea of the scale of a disaster as all media in the country are carefully controlled, particularly in Tibet.
But when the top leader, President Xi Jinping, offers personal directives, it is usually an indication an incident is very serious.
He has urged rescue teams to do all they can to search for those missing.
The border at Gyirong County is the main crossing point for tourists and traffic going between China and Nepal. Around 4,000 people live there. There were also a number of Chinese construction projects underway in the Tibetan border region, according to local workers who spoke to the BBC.
Multiple agencies have been mobilised including a team of 200 geological, engineering and emergency response personnel equipped with reconnaissance drones, 3D laser scanners, life detectors and rescue equipment were mobilised.
Roads, communications and power in the region are also still disrupted.



















