16 July 2014 Last updated at 15:22

Parents of the schoolgirls abducted by militant Islamists in Nigeria have denied playing politics by refusing to meet President Goodluck Jonathan. Tuesday's meeting failed to take place because proper protocol had not been followed, their spokesman said. Mr Jonathan said the parents had called off the meeting after being manipulated by the BringBackOurGirls campaign group.

Boko Haram captured more than 200 girls in the town of Chibok on 14 April. The row broke out as the alleged mastermind of a twin bomb attack in Nigeria's capital, Abuja, was extradited from Sudan back to Nigeria.