Vice President Yemi Osinbajo will preside over government businesses in his absence.
The President, according to a statement by his Special Adviser on Media and Publicity, Femi Adesina, has also notified the National Assembly of the development.
After returning on March 10 from a 49-day medical vacation in the United Kingdom (UK), President Buhari disclosed that he would be returning for further medical checks.
The statement did not specify the length of stay, but it said that the President’s return to the country will be determined by his doctors in the UK.
The spokesman said although the President had planned to leave Sunday afternoon, he shifted his flight till the night for the reception of the 82 Chibok schoolgirls, who arrived in Abuja earlier Sunday.
The statement reads: ”The President wishes to assure all Nigerians that there is no cause for worry. He is very grateful for the prayers and good wishes of the people, and hopes they would continue to pray for the peace and unity of the nation.
“The length of the President’s stay in London will be determined by the doctors. Government will continue to function normally under the able leadership of the Vice President.
“President Buhari has transmitted letters about the trip to the Senate and the House of Representatives, in compliance with Section 145 (1) of the 1999 Constitution.”