China adds troops, cameras, radiation detectors at North Korean border

China has ramped up security along its border with North Korea, installing new surveillance cameras, deploying extra security forces and operating radiation detectors as it braces for a potential crisis.

Bellicose rhetoric between Washington and Pyongyang has raised fears in China of a conflict that could send millions of North Korean refugees across the 1,420-kilometre (880-mile) border, and of nuclear fallout that could hit Chinese towns.