Islamic State-linked extremists in Nigeria have killed another abducted health worker despite an urgent plea from the International Committee of the Red Cross to spare her life, the global aid organization confirmed Tuesday.
"It's utterly devastating that we have to write that sentence," the Red Cross said in a statement, calling the killing "a despicable act of cruelty."
Nigeria's government announced the killing late Monday.
Hauwa Mohammed Liman, 24, had been working as a midwife in a hospital supported by the Red Cross. Her death comes a month after a health worker abducted with her was killed by the same group, the Islamic State West Africa Province, the largest Islamic State-linked extremist group in Africa. A third female health worker remains captive.
"The news of Hauwa's death has broken our hearts," the Red Cross’ regional director for Africa, Patricia Danzi, said. "We appealed for mercy and an end to such senseless murders. How can it be that two female healthcare workers were killed back-to-back? Nothing can justify this."
The Red Cross, which does not pay ransoms, has said it was not directly involved in discussions on the extremists' demands. On Sunday it issued a plea saying "we urge you for mercy" and noted that a 24-hour deadline was counting down.
The statement by Nigeria's information minister said "the federal government did all within its powers to save her life" and had kept the "line of negotiations" open since the abductions. The government said it was "shocked and saddened" and would continue to work for the safe release of other captives.
The three health workers were seized in March in the northeastern community of Rann, where thousands have sought shelter from the extremist threat that includes the Nigeria-based Boko Haram insurgency. They were praised for volunteering to work in a dangerous area while many others fled or chose to remain in safer communities.
Liman was "full of life" and "truly dedicated to her work helping vulnerable women," the Red Cross said.
U.N. Secretary-General Antonio Guterres said he was "appalled and strongly condemns the killing" and called for the release of all remaining hostages, spokesman Stephane Dujarric said. The U.N. chief stresses the importance of protecting those who provide humanitarian assistance to millions in northeast Nigeria, he said.
The killing in September of Saifura Hussaini Ahmed Khorsa also led to outrage. Still held captive is Alice Loksha, a nurse who worked at a center supported by the U.N. children's agency.
The same extremist organization also is holding Leah Sharibu, a student seized in a mass abduction in February. She remains captive while more than 100 of her fellow students were released because she is Christian. Her mother in recent weeks has said her life was in danger.
"We urge the group holding Alice and Leah to release them safely," Danzi said.
Nigerian President Muhammadu Buhari, who declared that defeating extremism was a top priority when he took power in 2015, last week sent three Cabinet ministers to meet with the families of Sharibu and the abducted health workers, his office said.