More details have emerged on how the Boko Haram terrorists in prison were swapped by Chibok girls. According to presidential spokesman, Garba Shehu, the Swiss government and International Committee of the Red Cross (ICRC) were behind the negotiations.
It seems that it was the ICRC that helped in the physical swap.
AFP was told by a source that the girls were brought in Red Cross vehicles to Kumshe, which is about 15km (nine miles) from a military base in Banki, a town that borders Cameroon.
"The four Boko Haram militants were brought to Banki from Maiduguri in a military helicopter from where they were driven to Kumshe in ICRC vehicles," the source said.
Another source added: "The 21 girls arrived in Banki around 3:00 (0:200 GMT) where they found a military helicopter waiting.”