MAIGUDURI, Nigeria (BBC.com)—Nigerian Islamist Boko Haram fighters have attacked the strategically important north-eastern city of Maiduguri, with dozens reported dead.
Earlier on Sunday they captured the north-eastern town of Monguno.
The BBC’s Will Ross in Lagos says that with the insurgents gaining ground, Maiduguri is increasingly at risk.
US Secretary of State John Kerry meanwhile has arrived in Nigeria to call for peaceful elections next month which need to set “a new standard”.
The vote looks set to be the closest since the end of military rule 15 years ago.
Our correspondent says that Mr Kerry is in Nigeria to show solidarity in the fight against Boko Haram, which has increased its attacks in recent days.