There were reported cases of explosions, on Saturday morning, at the 1000 Housing Estate in Maiduguri, Borno State.
This came as a rocket launcher also reportedly landed at Gomari Airport, a community near the state capital.
Residents of the estate were seen discussing the incidents in groups in a video that surfaced while a large crowd of people was also seen in one of the houses that were affected by an explosion.
However, unconfirmed report indicated that no life was lost in the incident.
A military source said that troops of 33 artillery, Njimtelo, opened fire when they sighted insurgents on the outskirts of Maiduguri.
The insurgents were said to have also engaged troops in a gun battle.
Efforts to get reaction from the Police Public Relations Officer in the Command, ASP Sani Shatambaya, proved abortive at press time.