He said a dusk-to-dawn curfew would remain and that anyone out during the day will be required to don a face mask.
While speaking during a national address on Monday, April 27, Buhari lamented that the lockdown measures have had heavy economic consequences with many losing their means of livelihood.
He also noted that state governors may choose to adapt and expand based on their unique circumstances provided they maintain alignment with the Federal Government's guidelines.
President Muhammadu Buhari said the lockdowns, which had been due to end on Monday, needed to continue until 4 May.
The president said this on Monday night while addressing Nigerians on the COVID-19 outbreak.
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Andrew Cuomo made the announcement at his Thursday press briefing after the state collected its initial 3,000 antibody samples. The rate for Westchester and Rockland was 11.7 percent and the rate for Long Island was 16.7 percent.
Buhari, however, noted that the phased and gradual easing of the lockdown will be strictly followed with aggressive reinforcements of testing and contact testing measures while allowing the restoration of some economic and business activities in certain sectors.
Some Nigerians, including state governors, have called for a partial lifting of the lockdown, with the governors forum advising intra-state movement be allowed, while interstate trips should be restricted.
Confirmed cases of the new virus have roughly quadrupled since a lockdown extension was announced on April 13, to 1,273 cases and 40 deaths, most concentrated in Lagos and Abuja.
The country first introduced measures to mitigate the spread of the coronavirus on March 30 by announcing a total lockdown of the commercial capital, Lagos, neighbouring Ogun and Abuja.
"State governments, corporate organisations and philanthropists are encouraged to support the production of cloth masks for citizens", Buhari appealed. Furthermore, the restrictions on social and religious gatherings shall remain in place.
He said Kano, being a predominantly Muslim state, usually buries its dead almost immediately which, therefore, makes it nearly impossible to determine the cause of death of a person.