President Muhammadu Buhari has received South African President, Cyril Ramaphosa, at the Presidential Villa, Abuja.
Ramaphosa arrived at the Villa at about 10 am on Wednesday and was received by president Buhari himself.
His visit to the Villa came barely hours after Nigeria Centre for Disease Control confirmed the first three cases of the Omicron variant of COVID-19 in Nigeria, saying they are linked to passengers from South Africa.
Omicron variant, a new strain of the coronavirus disease, was first detected in Botswana.
The World Health Organisation (WHO) has classified Omicron as a variant of concern.
It has confirmed in many countries, stoking global fears about a coronavirus pandemic that has killed more than five million people and savaged economies worldwide.
Canada on Tuesday banned travellers from Egypt, Nigeria and Malawi over fears of the spread of the new Omicron coronavirus variant, bringing to 10 the number of African countries targeted by Ottawa.