Rounds are fired from a ship during a joint naval exercise between China and Russia
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China and Russia hold their largest-ever joint naval drills

5 July 2013 Last updated at 19:47 BST

China and Russia are holding their largest ever joint naval exercises in the Sea of Japan.

The Asia-Pacific region is a strategic focal point for many countries and such exercises are seen as a way for the two countries to improve their efforts at military cooperation.

Tom Santorelli reports.