At least 12 killed in suicide blasts in north Nigeria

At least 12 people were killed on Wednesday when two female suicide bombers blew themselves up in a market in the northern Nigerian town of Chibok where Boko Haram militants abducted more than 200 girls almost two years ago, police and residents said.

Boko Haram has been waging a six-year armed campaign in Nigeria's remote north to build an Islamic state. Thousands have been killed and more than two million people displaced by the campaign.