General Abdulsalami Abubakar, the former military Head of State, is gravely ill, according to Thisday.
The retired Army General may have suffered a partial stroke.
Abubakar was reportedly flown out of Nigeria for medical treatment three weeks ago.
He was flown to Dubai in the United Arab Emirate (UAE), but is now in a UK hospital (UK).
Justice Fati Abubakar, Abubakar’s wife and former First Lady, was with him.
Abubakar Bello, his in-law and the governor of Niger, visited him after the All Progressives Congress (APC) presidential primary.
It was further gathered the National Peace Committee (NPC) Chairman is in a stable condition as doctors continue to monitor him.