Delhi Chief Minister Arvind Kejriwal on Sunday urged Prime Minister Narendra Modi to stop flights coming to India from countries affected by a new variant of coronavirus with immediate effect.

"Our country has fought a tough fight against corona for the last one and half years. With great difficulty and due to the selfless service of millions of our Covid warriors, our country has recovered from coronavirus," he wrote in the letter.

In view of the new Covid variant, a number of countries, including the European Union, have suspended travel to the affected regions, he said.

"We should do everything possible to prevent the new variant of concern, recently recognised by the WHO, from entering India... I urge you to stop flights from these regions with immediate effect. Any delay in this regard may prove harmful, if any affected person enters India," the letter read.

As concerns grow over the new COVID variant, Prime Minister Narendra Modi on Saturday called for a proactive approach and a review of plans for easing of international travel curbs, and urged people to be more cautious while several states moved quickly to take precautionary measures and remain vigilant.

Modi, who was briefed by officials about the recently discovered variant Omicron during a comprehensive meeting here to review the public health preparedness and COVID-19 vaccination, also highlighted the need for monitoring all international arrivals, their testing as per guidelines, with a specific focus on countries identified 'at risk'.

The Centre on Thursday had asked all states and Union territories to conduct rigorous screening and testing of all international travellers coming from or transiting through South Africa, Hong Kong and Botswana, where the variant of serious public health implications has been reported.

Meanwhile, the Delhi government has called a meeting of the Delhi Disaster Management Authority on Monday to discuss steps that need to be taken in view of threat of the new COVID-19 variant, Kejriwal had said on Friday.