Bangladesh has imposed a lockdown on a southern district, home to refugee camps housing more than a million Rohingya Muslims fleeing from Myanmar, to prevent the spread of coronavirus.
Officials said no-one was allowed to enter or exit Cox's Bazar district.No cases are confirmed in the camps, but aid agencies fear an outbreak could overwhelm poor medical facilities.
Most refugees arrived in the camps following a military crackdown in the neighbouring state in 2017.
Almost 750,000 crossed the border, joining hundreds of thousands of refugees already living there, reports BBC.
Last week Human Rights Watch warned that 350,000 people within Myanmar itself were especially vulnerable to coronavirus.