The fighters of the Boko Haram Islamic sect attacked Madagali Local Government Area of Adamawa State on Tuesday.
An intelligence source said on Tuesday that the attackers attempted to overpower a unit of soldiers without success around Barkin Dutse.
The source said that the insurgents were still involved in a gun duel with troops as of 2.20pm when our correspondent filed this report on Tuesday.
It was learnt that the soldiers had an upperhand against the insurgents while some troops were drafted to the Cameroonian side of the border to block it.
The source stated also that soldiers surrounded all the exit points to and outside Madagali to prevent the insurgents who invaded the area from fleeing.
"As we speak now, the Boko Haram members are attacking Madagali. They attempted to overpower a military unit at Barki Dutse area but the soldiers responded sharply to the attack.
"They have not been overpowered completely; they are still fighting but soldiers have been deployed to all the exit points from Madagali.
"Troops have also gone to block the Cameroonian side of the border to prevent them from escaping."
It was further gathered that a suicide bomber killed nine people at Garkida, in Gombi Local Government area of Adamawa State.
It was learnt that the suicide bomber detonated the Improvised Explosive Device at the Garkida Market when activities were picking up in the market on Tuesday.
It was further gathered that some members of a youth vigilante group apprehended another set of two suicide bombers who were caught with unexploded IEDs wired to their bodies.
The two terror suspects were said to have confessed that six of them were involved in the mission to unleash violence on the Garkida Market.
They were also said to have told their interrogators that the whereabouts of three of the suicide bombers was unknown while one died in the suicide attack on the market.
"A suicide bomber has killed nine people in Garkida Market today (Tuesday). You know today is the market day and the bomb went off when the people were selling their wares in the market.
"I can't say the exact time it happened but it was in the morning. Two of the suspects who had bombs strapped to their bodies were apprehended.
"The two who were arrested confessed that there were six suicide bombers who were sent to the market but three escaped and one died in the explosion."
Our correspondent could not get the Director Defence Information, Maj. Gen. Chris Olukolade, to comment on the story as calls to his mobile telephone line did not connect.
Also Olukolade did not respond to a text message on the issue as of the time of filing the report.
Meanwhile, the troops of the Nigerian Army said they have killed a large number of insurgents in an encounter with the terrorists' elements at a location in Gwoza Local Government Area.
Investigation revealed that the soldiers and the insurgents had a long-drawn battle on Saturday in a hilly hamlet between Paulka and Gwoza.
A security source who confided in our correspondent said that the troops of the 121 Special Forces battalion carried out the military action that culminated in the killing of over 50 of the insurgents.
It was learnt that the soldiers who were deployed in the hilly mountains of Gwoza close to the nation's border with Cameroon sighted a large number of the Boko Haram insurgents and engaged them in a gun duel.
The source said that the insurgents were moving out of the Sambisa Forest to get food items in a particular location when they were sighted and the gun battle ensued.
It was gathered that a soldier who was hit by the insurgents' bullets was quickly flown to Maiduguri for urgent medical attention.
The soldiers of the 121 Special Forces Battalion last week encountered many insurgents between Paulka and Gwoza. Several of the insurgents were killed in the attack.
"Our guys who were drafted to the top of the hills spotted the terrorists while they came out of their hideouts in the Sambisa Forest to look for food.
"They were not expecting the attack, so we got them seriously. One of the soldiers who sustained bullet wounds was immediately moved to Maiduguri for urgent medical action."
Our correspondent could not get Olukolade to comment on the development also as calls to his mobile telephone line did not connect.
He also had not responded to a text message on the issue as of the time of filing this story.

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