In an exclusive interview with Al Jazeera, Nigeria's President Goodluck Jonathan has pledged to defeat Boko Haram, the armed group that has killed thousands of people in the country's northeast.

Jonathan denied mishandling the Boko Haram crisis and allegations that a recent escalation in military operations against the group was politically motivated.

He also expressed fears about violence during the upcoming presidential election which was postponed because of a lack of security.

Al Jazeera's Yvonne Ndege spoke to Jonathan in Lagos.

Source: Al Jazeera