A protest has broken out in the Moria migrant detention centre on the Greek island of Lesbos... during a visit by the Greek migration affairs minister and a Dutch official. Stone-throwing migrants clashed with police.

An official spoke on condition of anonymity said migrants began shouting "freedom" and "open the borders," and banging metal objects. Police said the unrest began in the section housing unaccompanied teenagers, with protesters starting fires by burning rubbish. The Moria camp was converted into a closed detention centre after a EU-Turkey deal. 

Under the agreement, those arriving on Greek islands from March 20 onwards are detained and face deportation unless they successfully apply for asylum in Greece. Aid workers said tensions had been building in the camp for days but it was unclear what triggered the unrest in the centre.