Nigeria helicopter crash
A Nigerian military helicopter crashed in Adamawa state where government forces are trying to halt a violent insurgent by terror group Boko Haram Getty Images

A Nigerian military helicopter has crashed and exploded in Adamawa State, where Boko Haram conduct a rampant campaign of violence and intimidation.

The incident occurred in Damare, a suburb of Girei Local Government Area of Adamawa state, one of the three states most affected by Boko haram's activities.

A security source in the capital Abuja told Reuters that some casualties were reported but declined to give further details.

However, the military sources confirmed that no one had died in the incident.

It was the second Nigerian military helicopter to go down this week in Adamawa State.

"It is true a helicopter just crashed near Mautech [Modibbo Adama University of Technology‎] at around 9:30 pm," a Yola resident told Nigerian newspaper Premium Times.

"There were actually two of them flying beside each other and when one crashed, the other one turned back."

Another witness said: "We came out of our hostel when we heard the sound of choppers and noticed that there were two of them flying in the dark without lights on.

"Suddenly one of them went down and exploded with a deafening sound. Immediately after that happened the other one turned back and left. Obviously there were explosives inside the chopper because intermittent explosions followed the fall of the helicopter creating a huge fire blast.

"Even as we speak, you can see the huge fire blazing from our hostel, although the explosions have abated a little.

The spokesperson of the Nigerian Air Force, Dele Alonge, an Air Commodore, confirmed the incident, but did not give further details.