What is the fine-grained topic of the following text: The said Ade, according to DAILY GUIDE’s sources, was placed on the ‘Stop List’ at the Kotoka International Airport (KIA) after the Bureau of National Investigation (BNI) detected that he was using both Ghanaian and Nigerian passports at the same time. Only return the topic.
Ade's placement on airport 'Stop List' due to dual passport usage detected by BNI