Mumbai, Nov 30 : Amid concerns of the Covid-19 variant Omicron, the reopening of schools from Class 1 to 7 has been postponed by 10-15 days in Mumbai, Pune and Nashik, officials said here on Tuesday. The BrihanMumbai Municipal Corporation Commissioner I.S. Chahal and Pune Municipal Corporation Mayor Murlidhar have said that schools in the two cities -- both among the worst-hit in the Covid-19 two waves in 2020 and 2021 -- will now reopen from December 15. Similarly, the Nashik Municipal Corporation, which was also among the badly-hit cities in the past two years of the pandemic, has also postponed the schools reopening plan to December 10. However, all schools in the rest of Maharashtra are likely to reopen from December 1, for Class 1 to 5 in the rural areas and 1-7 in the urban areas with full Covid protocols, as announced earlier by School Education Minister Prof. Varsha E. Gaikwad. Taking precautions, the BMC is currently tracking all passengers who have arrived in the city from the 12 Omicron-hit nations since November 10 to detect if any of them are infected by the new strain. The state government has also sought information on all passengers landing at the three international airports in the state in Mumbai, Pune and Nagpur, besides those arriving from other states, by flights originating from the 12 nations. The BMC has already announced that a 14-day institutional quarantine regime will be compulsory for all such passengers and home isolation will not be permitted under any circumstances. The state, major cities and district health authorities are gearing up to face the challenge of Omicron by readying hospitals, beds, ICUs, liquid medical oxygen stocks, medicines, doctors, para-medical and non-medical staff, and other health infrastructure to cater to a possible patient rush in the coming weeks, even as Covid-19 vaccination drive has gained momentum. /IANS