Mauritius Foreign Minister Dhananjay Ramful on Saturday vowed to "spare no effort" to reclaim the strategic Chagos Islands in the Indian Ocean, whose main island of Diego Garcia hosts a US-UK military base.
His remarks come after Britain indicated it would shelve plans to hand back the islands unless the United States supports the deal.
US President Donald Trump has previously criticised the agreement, describing it as "an act of great stupidity".
"We will spare no effort to seize any diplomatic or legal avenue to complete the decolonisation process in this part of the Indian Ocean," Ramful said at an Indian Ocean Conference held in Mauritius.
"This is a matter of justice," he added.
Strained relations
UK Prime Minister Keir Starmer’s Downing Street office said in a statement the deal would proceed only "if it has US support", after reports the Chagos legislation risked running out of parliamentary time with no fresh bill planned.
Mauritius Attorney General Gavin Glover said the outcome "does not come as a surprise", blaming it on strained relations between Trump and Starmer.
"We are dependent on Anglo-American relations...the USA and Britain will have to reach an agreement," Glover told a local newspaper.
Mauritius is set to meet the British government on April 22 over the Chagos deal, Glover said.
