President Bingu wa Mutharika is reportedly hospitalised at Kamuzu Central Hospital in Lilongwe over a heart condition.
A number of high-ranking government officials and First Lady Callista Mutharika, some of his children and some relations of the president are camped at the hospital.
Unconfirmed reports indicate that Mutharika is in the hospital's intensive care unit (ICU).
According to a source who was around the hospital's premises, Mutharika arrived at the hospital in an ambulance registration MG 948 AB at around 11:35am.
About three hours later, his son Madalitso was seen leaving the hospital wearing tinted glasses.
He was soon followed out by Chief Secretary to the Office of the President and Cabinet (OPC) Bright Msaka, Minister of Energy Goodal Gondwe and Inspector General of Police Peter Mukhito.
His condition remains unknown.