"One suspected patient of Omicron has been found in Dharavi. The person arrived from Tanzania and has tested positive for Covid-19. His sample has been sent for genome sequencing and the results are awaited. He has been admitted to the hospital after testing positive for the virus," Pednekar said.
The Mumbai Mayor said the close contacts of the man were being tested for Covid-19 and his travel history was being traced. The Brihanmumbai Municipal Corporation (BMC) is taking all necessary precautions.
"If travellers from at-risk countries test positive for Covid, then they are examined and treated at a Covid designated hospital," the Mumbai Mayor said.
On December 4, the samples of 288 foreign returnees were sent for genome sequencing and the results were awaited, Pednekar added.
Meanwhile, India reported its fifth Omicron positive case in Delhi on December 5. On December 4, a South Africa returnee tested positive for Omicron in Maharashtra's Kalyan-Dombivli and another case was reported in Gujarat's Jamnagar. India's first two cases of Omicron were reported in Karnataka.
A new variant of Covid-19 was first reported to the World Health Organisation (WHO) from South Africa on November 25. As per the WHO, the first known confirmed B.1.1.529 infection was from a specimen collected on November 9 this year.
On November 26, the WHO named the new COVID-19 variant B.1.1.529, which has been detected in South Africa, as 'Omicron'. The WHO has classified Omicron as a 'variant of concern'.
New Covid-19 variant Omicron reaches Delhi; Tanzania returnee tests positive
Delhi reported its first case of new Covid-19 variant Omicron on Sunday. Read more