Paul Biya holds on to title of world's oldest ruler.

Biya has held on to his title as the world's oldest serving head of state.

The 92-year-old defied widespread calls to step down and has been criticised for only showing up for one campaign rally, where he promised voters that "the best is still to come".

Having already been in power since 1982 - another seven-year mandate could see him rule for 50 years. By 2032 he'll be almost 100 years old.

His election victories have been marred by allegations of vote-rigging - claims which his party and the government have continuously denied.