The first probable case of the Omicron variant of COVID-19 has been detected in Switzerland, the government said late on Sunday, after a person who returned from South Africa around a week ago was found positive for the virus.

Botswana has so far confirmed a total of 19 cases of the newly-discovered Omicron variant, Health Minister Edwin Dikoloti said Sunday evening.

Czech Republic on Monday confirmed one suspected case of COVID-19 as the infection of Omicron variant, a female who flew from Namibia last week and transited via South Africa.

Rwanda has temporarily suspended direct flights with southern African countries due to concerns over the new variant.

The 13 reported cases of COVID-19 at the Portuguese football club Belenenses appear to be the Omicron variant, Portugal's national health institute (INSA) announced Monday.

Scottish First Minister Nicola Sturgeon said on Monday it was unlikely but not impossible that six cases of the Omicron variant of COVID-19 found in the community were linked to the COP26 conference held earlier this month in Glasgow.

The Philippines on Monday launched an ambitious drive to vaccinate nine million people against COVID-19 in three days, deploying security forces and thousands of volunteers in a program made urgent by the threats of the Omicron variant.

Australian Prime Minister Scott Morrison announced Monday night that the National Security Committee (NSC) has pushed back the planned easing of border restrictions for international students and visa holders.

At a WHO special assembly, Germany and EU both on Monday voiced support for launching negotiations for a binding international accord on preventing pandemics in light of the spread of Omicron.

(With input from agencies)