In a statement, the ministry said another militant was arrested by National Guard forces during a security sweep in a mountainous area in the west-central Kasserine province.
According to the statement, a Kalashnikov rifle and materials to be used in making explosives have been seized during the operation.
Last month, security forces killed two militants in a security operation in Sidi Bouzid, a town 200 km (125 miles) southwest of the capital Tunis.
Tunisia has launched a relentless crackdown on militants in recent years, especially since the country suffered major attacks since 2011.
