Reuters »

Iran, China and Russia began joint naval drills on Friday in the Indian Ocean and Gulf of Oman, in what Moscow said was an unprecedented exercise in naval cooperation and training.

Waters around Iran have become a focus for international tensions, with the United States exerting pressure for Iranian crude oil sales and other trade ties to be cut off.

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The Gulf of Oman is a particularly sensitive waterway as it connects to the Strait of Hormuz, through which about a fifth of the world’s oil passes and which in turn connects to the Gulf.

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