Amid growing concerns over the new COVID strain in the UK, a dozen flyers from the country were found positive after arriving in the city in the 24 hours up to Tuesday. Half of them have recovered, said officials.

"Out of the 12 passengers, six passengers have recovered which is a good sign. But as a precautionary measure, we have sent the samples of all the patients to National Institute of Virology, Pune, for genome sequencing," said Suresh Kakani, a BMC additional commissioner.