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Ribadu spoke on Thursday, during a presentation on security achievements of the President Bola Tinubu administration, at the All Progressives Congress (APC) national summit.
The NSA said the Tinubu administration inherited five major security crises across the country.
He listed them as Boko Haram in the north-east; armed banditry in the north-west; secessionist agitations by the Indigenous People of Biafra (IPOB) and Eastern Security Network (ESN) in the south-east; Niger Delta unrest; and communal/herder-farmer conflicts in the north-central.
Ribadu said through combined efforts, security agencies have been able to contain the mass killings, kidnappings and destruction perpetrated by criminal elements across the country.
Highlighting the achievements, the NSA said over 13,543 Boko Haram fighters were neutralised in the past two years, with over 11,000 arms recovered and destroyed.
He added that 124,408 Boko Haram fighters and their families have surrendered to troops since the inception of the Tinubu administration.
He said despite setbacks, military operations are ongoing in the Tumbuktu Triangle, Tumbu islands and other enclaves.
“In the south-east, a welcome development is the sit-at-home orders are becoming more and more ineffective,” he said.
“Key IPOB/ESN figures captured or neutralised. Over 50 police stations and many police posts have been rebuilt.
“Attacks on security forces significantly reduced. Social and economic activities are normalising.
“In north-west, a watershed year in the fight against banditry, 11,250 hostages freed; a decline in mass abductions.
“Decisive blows to top warlords… Ali Kachalla, Boderi, Halilu Sububu, Dangote, Isuhu Yellow, Damuna etc were eliminated.”