In Nigeria, the agency mainly responsible for the maintenance of internal peace and security is the

In Nigeria, the agency primarily responsible for maintaining internal peace and security is the police. The police force is a national security agency charged with the responsibility of enforcing the law, protecting lives and properties, and maintaining order and public safety within Nigeria. The Nigerian police force is divided into various departments, including the Criminal Investigation Department (CID), Mobile Police Force (MPF), Special Anti-Robbery Squad (SARS), and other tactical units. They work with other security agencies like the army, navy, and civil defence corps to ensure peace and security in Nigeria, but the police force is the primary agency responsible for maintaining internal peace and security.