Islamic State West Africa Province ( ISWAP ) a Boko Haram splinter group had kidnapped six members of an aid organisation last July.
A Paris based NGO has reported that four of its staff kidnapped since last July have been executed in Nigeria by ISWAP
The four hostages who were all Nigerians were among six hostages held by the terror group since last July the French aid group Action Against Hunger said on Friday. The NGO added that one of its staff and two drivers were among those killed.
“The armed group responsible for the kidnapping of humanitarian workers on July 18, have murdered four hostages,” the Action Against Hunger said in a statement that did not identify the victims.
Another of the hostages was killed in September.
The French aid group called for the immediate release of the last hostage, saying it is “extremely concerned and calls for the immediate release of its staff member, Grace, who remains in captivity.”
The six hostages include Action Against Hunger employee, two drivers and three health ministry personnel were kidnapped while delivering humanitarian aid to vulnerable people near the town of Damasak in Borno State.
Their driver was killed during the ambush by ISWAP which separated from the armed group Boko Haram.
The group have repeatedly attacked military bases and previously targeted aid workers in northeast Nigeria.
“Action Against Hunger condemns these latest killings in the strongest terms and deeply regrets that its calls for the release of the hostages have not been acted upon,” the group said in its statement.
On Thursday ISWAP fighters killed 14 pro-government fighters and a police officer in northeast Nigeria, militia leaders told AFP on Friday.
The militia was made up of local hunters across the northeast along with the state-funded Civilian Joint Task Force, an armed vigilante group.
More than 35,000 people have been killed and up to 2 million made homeless in the northeast since the decades-old conflict began.
The violence has now spread to neighbouring Niger, Chad and Cameroon, prompting a regional military coalition against the fighters.
Action Against Hunger said it is currently providing food assistance every month to approximately 300,000 people in northeast Nigeria, as well as helping thousands more with life-saving health and nutrition services.