A Nigerian Army soldier on Thursday, November 17, shot and killed his colleague and a humanitarian worker at a military base in Borno state.

In a statement signed by Major General Samson Zhakom, the assistant director of Army public relations, headquarters theatre command of Operation Hadin Kai, said the soldier also injured the co-pilot of one of the United Nations helicopters in the state.

Zhakom noted troops on the ground had immediately neutralised the errant soldier while the injured co-pilot has been medically stabilised.

His words: "The Theatre Command Operation HADIN KAI regrets to inform the public of a sad occurrence at one of our military base today.

"A soldier shot and killed a staff of one of the NGOs providing humanitarian support in the North East.

"Same soldier also killed another soldier and injured the co-pilot of one of the UN helicopters. Own troops on the ground immediately neutralized the errant personnel."

The statement also said that the deceased have been moved to the 7 Division Hospital as details investigation into the matter is ongoing.

He said: "The injured co-pilot has been stabilized while the corpses of the deceased have been moved to the 7 Division Hospital.

"Detailed investigation into the incident and subsequent remedial actions have commenced into the highly regrettable incident. Further details will be provided later."