The group who held a peaceful protest in Abuja further demanded for the resignation of President Buhari failure to which Section 144 of the 1999 Constitution be applied.
He maintained that the demonstrators had only succeeded in exercising their freedom under the constitution by embarking on a peaceful protest.
"The President has complied 100 per cent with the constitution by handing over power to the Vice-President before proceeding on his vacation", Mr. Shehu said.
"On the call for the President to resign or disclose whatever, I think they are stepping outside the laws of this country".
"He has handed over power to the Vice President, relying on the constitution and the Vice President is carrying on with the affairs of this country". What he has done is perfectly in line with the constitution and people are looking for things to say.
Meanwhile, Daily Trust reported Monday that Wife of the President, Mrs. Aisha Buhari left for United Kingdom on Sunday August 6 to be with the President, and according to presidential staff, with high expectation to return with him to Nigeria.
"On the second issue, demanding the President's return, or resignation or certain explanations, I would say that they have over-stepped their bounds".
Some of her staff hinted that there is a possibility that she will return to Nigeria with her husband at a time yet to be officially confirmed.
About five months after the Archbishop of Canterbury, Justin Welby, paid a personal visit to President Muhammadu Buhari at Abuja House, London, the cleric repeated the visit yesterday.
Aisha's return trip to London was confirmed by her Special Assistant, Media and Publicity, Mrs. Adebisi Olumide-Ajayi, on Monday.
Speaking on the state of Buhari's health and when he is likely to return, Adesina said: "Its already In the public domain that the President is recovering very well and as soon as the doctors give the all-clear, he will be back home".