The Federal Government on Monday said Nigeria had 40 coronavirus cases and one death caused by the disease.
The Minister of Health, Dr Osagie Ehanire, had earlier at a press conference in Abuja on Monday said the country had 36.
But at 11pm on Monday, the Nigeria Centre for Disease Control on its twitter handle said the cases had increased to 40.
The Federal Government also advised Lagos and Abuja residents to stay at home to prevent the spread of the disease.
Giving an update on COVID-19 cases, Ehinare said the Federal Government would publish names of people who refused to go into self-isolation after returning to Nigeria from countries with high burden of coronavirus.
He said Nigeria could be heading the way of China and Italy, which had recorded high number of coronavirus cases and deaths. The health minister said some people who had been infected were hiding.
Nigeria recorded its first coronavirus case on February 27 when an Italian was diagnosed with the disease, but the Federal Government then rejected advice that it should ban flights from high-risk countries.
The government on Thursday banned flights from 13 high-risk countries when the cases increased to 18.