Army spokesman Colonel Sani Usman, stated this in a statement made available yesterday.
He said, “Nine terrorists sneaked into Maiduguri armed with AK-47 assault rifles and (a) Hilux vehicle laden with 20 improvised explosive devices”.
According to him, the IEDs were “meant to be detonated at some selected targets in the city”.
But Usman did not elaborate in the statement about potential targets and refused to comment further when contacted by AFP to ask whether the nine suspects had been arrested.
But he added: “We will let you know at the conclusion (of a preliminary investigation) what exactly they wanted to do.”
Nigeria’s army has in recent months claimed a series of successes against Boko Haram, pushing them out of captured territory, destroying camps and rescuing hundreds of people held captive.
It has also claimed the arrest of a number of wanted suspects.
The army further said that it had “discovered and destroyed” an IED and rocket-making factory near the town of Bama, 72 kilometres (45 miles) southeast of Maiduguri by road.
Items recovered included gas cylinders, pipes, poles and welding equipment plus locally made rocket shells, unprimed IEDs and chemicals.