21 of the more than 200 school girls abducted by Boko Haram fighters from Chibok in Borno state has been released.
Agency reports said the released 21 girls were exchanged with four top commander of the sect.
But information and culture minister, Alhaji Lai Mohammed denied the exchange of the 21 girls with Boko Haram prisoners.
He said they were freed following what he called painstaking negotiations and trust on both sides.
Earlier, senior special adviser to the president on media and publicity, Garba Shehu who first confirmed the release, explained that the release of the abducted girls in limited number, was the outcome of the negotiations with the sect.
He said the deal was brokered by the international committee of red cross and the government of Switzerland, adding that the negotiations with the sect on the remaining abducted girls was still ongoing.
Mohammed said a team of medical experts, including medical doctors, psychologists, social workers and trauma specialists had been assembled to examine the girls.
President Muhammadu Buhari who received the cheering news as he was about to fly out on an official visit to Germany, said he was delighted with the release of the 21 of the abducted 218 girls.
He however asked Nigerians to be mindful that more than 30,000 fellow citizens had been killed by Boko Haram in the north east region.