Islamic extremists released a video showing the slayings of five aid workers who were abducted last month in northeastern Nigeria.
Their abductions came around the same time that a Boko Haram splinter group said it would begin targeting Nigerians who work for international aid groups as well as those who help the military.
Nigerian President Muhammadu Buhari issued a statement identifying the victims as staff members of the country’s State Emergency Management Agency and the international charities Action Against Hunger, Rich International and International Rescue Committee.
Buhari vowed that his government would do everything it could so that “the perpetrators of this atrocity face the law.”
“They were committed humanitarians who devoted their lives to helping vulnerable people and communities in an area heavily affected by violence,” said Edward Kallon, the U.N.’s humanitarian coordinator in Nigeria.
Security has long been a concern for aid groups operating in the northeast, where humanitarian workers have been kidnapped and killed during Boko Haram’s decade-long insurgency against the Nigerian government.