Twenty eight Biman passengers returned from UK tested positive for Covid-19 and were taken to institutional isolation at a hospital in Sylhet on Monday night.

A flight of Biman Bangladesh Airlines carrying 157 passengers from London landed in Sylhet's Osmani International Airport on January 21.

They were put under institutional quarantine at different hotels for four days following health guidelines of Health Ministry.

Upon completion of their quarantine, their samples were sent for Covid-19 PCR tests on Sunday and 28 of them tested positive.