North Korea has test-fired a medium-range ballistic missile from its eastern port of Sinpo into the Sea of Japan, according to BBC.

South Korea's defence ministry said the missile flew about 60km (40 miles).

It is the latest in a series of tests which the North has been conducting in pursuit of its goal of developing a nuclear missile.

The launch comes on the eve of a visit by China's President Xi Jinping to the US to meet President Donald Trump.

The two will discuss how to rein in North Korea's nuclear and missile programmes as the US steps up the pressure on China, a historic ally of Pyongyang, to help more on the issue.