Nigerians gather outside the Nigerian High Commission in London, where President Muhammadu Buhari is reported to be staying.
They are protesting and demanding that he address them even if it is just for five minutes.
More and more Nigerians are raising doubts over the health and existence of President Buhari.
One observer, who pleaded anonymity, asked: "Could this be a repeat of Yar'adua scenario?"
The Presidency had, on Sunday, issued a press statement announcing that Buhari won't be coming back as scheduled.
Senior Special Assistant on Media and Publicity had said that he put of his return indefinitely pending when the doctors will clear him.