Nigerian Information Minister: We will investigate Amnesty report

Labaran Maku, Nigeria's Information Minister told the BBC they will investigate an Amnesty International report which alleges that the authorities had advance warning of the raid on a school.

The human rights group has alleged that the Nigerian authorities failed to act despite the warning.

Mr Maku said if the government had been aware there would have "been an intervention".

The raid by Boko Haram led to the abduction of more than 200 schoolgirls who have now been missing for 25 days.