Five more persons, who arrived in Mumbai from 'at risk countries' tested positive for Covid-19 infection on Thursday amid concerns over the new Omicron variant of the virus, the Brihanmumbai Municipal Corporation (BMC) officials said.

The civic body's additional municipal commissioner Suresh Kakani said the number such travellers who have tested positive on arrival in the city and who are suspected to have been infected with the Omicron variant, increased to nine.