Several thousand people have returned to the Gambia since ex-president Yahya Jammeh ceded power.
It is feared that more people may continue to leave as the situation remains tense
Most new arrivals are children, sent by their parents to Senegal as a precautionary measure.
The Bank organized a two-day forum in Abidjan to explore, among other issues, how to better support countries affected by displacements of populations.
Wrapping up a 10-day visit to Niger, Chad, Cameroon and Nigeria, Filippo Grandi vows to assist 460,000 people displaced by insurgency.
“This is one of Africa’s largest displacement crises and the world cannot afford to brush it under the carpet”