There are nearly 22,000 Nigerians registered as missing with the International Committee of the Red Cross (ICRC).
Spokesperson for the ICRC, Peter Maurer says this makes Nigeria the country with highest number of registered missing people because of conflict in the world.
Speaking with the BBC, Maurer says the true number is likely to be much higher, and that most of the victims are children separated from their families during the decade-long insurgency of the Islamist group Boko Haram.
“In Nigeria, there is broad territory, and groups which are out of reach of ICRC, and so population under control of these groups are not reachable by the ICRC and that’s the reason why it’s more difficult to get the data together to reunify families as in other places,” he said.
Only 367 missing people have been found in Nigeria to date since the start the ICRC began tracing those missing in 2013.