With the apprehension of the robbers it can be assumed that they or at least one in the group with spill the beans (plea bargain) about their organisation, modus operandi, other crimes, and the insiders who were/are collaborating with them.
One swallow doesnt make a summer but at laest it is a beginning.
Many nationalities from Africa, and other tourists from all over the world are targeted by these syndicates. Its not just aimed at Nigerian visitors.