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The Mauritian flag has been raised for the first time on the Chagos Islands - an Indian Ocean archipelago controlled by Britain, but claimed by Mauritius.
Britain took control of the Chagos Islands half a century ago, evicting the population of more than 1,000 people to make way for a US military base.
The flag-raising was done as part of a reef-mapping trip organised by the Mauritian government.
The Foreign Office said the UK had "no doubt" as to its "sovereignty over the British Indian Ocean Territory".
More on this story: Mauritian flag raised on Britain's Chagos Islands