China has called on Russia to carry out a full investigation after a shooting incident involving a Chinese-owned vessel off the port of Nakhodka.

Eight sailors went missing after Russian border guards opened fire.

Russian says the freighter, which later sank, was being investigated for possible links to smuggling and had set sail from Nakhodka without permission.

It is still unclear what caused it to sink, although it is said to have tried to turn back to port in heavy seas.