Nigerian troops have arrested one Shehu Jatau, said to be leading Tarok militia group.
An army statement said Jatau, alongside five of his accomplices, was arrested in a hotel in Abuja.
The suspect is alleged to have masterminded various attacks, causing loss of lives and properties worthbillions of naira.
The army also alleges Jatau leads a kidnapping ring, extorts money and unleash mayhem on innocent residents.
Relatedly, the army says two drug peddlers, Joe Agai and Benjamin Jumbo, were arrested and substances likely to be cannabis recovered from them.
Also recovered from Agai is a locally-made pistol, as stated in the statement.
Speaking of its other successes, the Nigerian Army said it cleared several Improvised Explosive Devices (IEDs) planted by fleeing Boko Haram terrorists in Borno and Yobe states.
Also, the army states it recovered one General Purpose Machine Gun, GPMG, abandoned by insurgents fleeing from a military raid of their camp.
Kidnap victims were reportedly rescued at the camp. Other activities, as said, were arrest of suspected cultists at Jos University Teaching Hospital in Jos; rescue of two kidnapped victims in Sokoto, and arrest of a wanted kidnapper, Umaru Abubakar Kaduwa along Kano – Kaduna Highway.
Down south, the army said its efforts had reduced oil theft and led to the arrest of 18 suspects.
The statement adds that illegal oil refining camps, 35 Cotonuo boats, three large storage reservoirs, seven metal storage tanks were destroyed, and 10 vehicles belonging to oil bunkers was impounded.