This article has been updated.
Analysts say Boko Haram is a fragmented coalition comprising different factions, rather than a single organisation. Liman and Loksha worked as nurses, helping to deliver babies and provide basic services.
Boko Haram is infamous for numerous attacks and abductions in the western and central African region. They killed four soldiers and four policemen as well. Liman and Loksha were kidnapped, as was another aid worker, Sifura Khorsa. Unfortunately, Saifura Hussaini Ahmed Khorsa was executed in September.
One month ago, ISWAP warned it would kill the 15-year-old Sharibu if its ransom demands were not met.
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 on Tuesday.
Information minister Lai Mohammed described the killing as dastardly, inhuman and ungodly. Before and after the deadline issued by her abductors, the federal government did everything any responsible government should do to save the aid worker.
On its website, on Sunday, the ICRC had appealed to "the Nigerian government and to communities and individuals with influence to work toward the release of two committed medical workers abducted in north eastern Nigeria earlier this year". "Speed and urgency are critical", it wrote.
Hauwa Liman, a midwife, was killed days after kidnappers set a deadline.
"Hauwa is the second abducted health worker in Nigeria to be murdered in the last month".
"The town's population has more than doubled because of the conflict, while most local health-care staff have fled". Still held captive is Alice Loksha, a nurse who worked at a center supported by the United Nations children's agency.
Leah is the only one out of the 110 girls abducted at the Dapchi Government Girls' Science and Technical College, who refused to denounce Christianity.
The terrorist group equally vowed to keep Leah Sharibu, the remaining Dapchi schoolgirl, as "a slave for life", the paper said.
The Boko Haram insurgency has killed more that 20,000 people and displaced 2 million, according to Al Jazeera. The open facilities are overwhelmed.
"The news of Hauwa's death has broken our hearts", said ICRC's Regional Director for Africa, Patricia Danzi.