US Secretary of State meets Nigerian president Goodluck Jonathan

US Secretary of State John Kerry arrived in Lagos, Nigeria, on Sunday in a rare high-level visit to Africa's most populous country. He met Nigerian President Goodluck Jonathan, who is running for another term in the country's elections next month. Kerry urged Nigeria's leading presidential candidates to refrain from fomenting violence after next month's vote. Kerry's visit came as Nigerian troops battled extremists who attacked Maiduguri, the biggest city in the Nigeria's northeast. He condemned the savage attacks by Boko Haram, an al-Qaida-linked insurgency. Kerry was in the country's commercial capital, Lagos, about 1,000 miles (1,600 kilometres) southwest from the skirmishes that killed more than 200 combatants.