Peter Obi: Nigeria's surprise presidential challenger

At 61, former governor Peter Obi is the youngest of the three frontrunners for Nigeria’s top job in this weekend’s presidential election.

With a message that he is the only candidate offering real change, Obi, a wealthy businessman from southeast Nigeria’s Anambra state, has emerged as an unexpectedly powerful force in the race.

He challenges ex-Lagos governor Bola Ahmed Tinubu, 70, of the ruling All Progressives Congress (APC) and 76-year-old ex-vice president Atiku Abubakar of the main opposition Peoples Democratic Party (PDP).

The two old warhorses — Tinubu and Abubakar — have dominated the Nigerian political landscape since the return of democracy in 1999.