- Group aims to impose Sharia law in northern Nigeria
- Arrested man was number 58 on list of most-wanted Boko Haram suspects
Abdullahi Abubakar Sadiq was arrested in the town of Uba, in Nigeria's northwestern Borno state, according to the statement.
He was number 58 on the list of the 100 most-wanted Boko Haram suspects, which was released earlier this year by the military.
Suspect number 100 on the list is the group's leader, Abubakar Shekau.
Two other suspected Boko Haram terrorists were arrested, the army said.
Boko Haram aims to impose Islamic law, or Sharia, and carries out deadly attacks in northern Nigeria and surrounded areas despite the government's efforts to halt its campaign of terrorism.
In 2014, the group kidnapped nearly 300 schoolgirls. The girls were abducted on the night of April 14-15 in the town of Chibok, in northeastern Nigeria, about a two-hour drive from the border with Cameroon. Their whereabouts is unknown.