Nigeria's President Goodluck Jonathan has vowed to defeat Boko Haram, the armed group that has killed thousands of people in his country's northeast.

In an exclusive interview with Al Jazeera's Yvonne Ndege in Lagos, he denied allegations that his government has mishandled the threat from the group.

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

Source: Al Jazeera