Nigeria's President Muhammadu Buhari in an interview with the UK Telegraph expressed disappointment that the previous tenure added mercenaries to fight the Boko Haram insurgents.

"I personally was very disappointed that the previous government resorted to mercenaries. I was also disappointed by the recent revelations of how military allocations were also misappropriated.

"How is it that Nigeria's military, which has a good record across west Africa, cannot claim back to 14 out of 774 local governorates from Boko Haram? They have to ask for mercenaries from South Africa? How the mighty has fallen!" he said.