An audio recording sent by one of the midwives abducted during the attack by Boko Haram insurgents on the Internally Displaced Persons (IDPs) camp at Rann, Borno state, has been obtained, Vanguard reports.
The medical charity Doctors Without Borders suspended work in the town a day after the attack and evacuated 22 national and worldwide staff.
"We are deeply shocked by the loss of three humanitarian colleagues in Rann", said Doctors Without Borders International President Dr. Joanne Liu in the release.
Gunmen have killed at least three aid workers in the northeastern Nigerian town of Rann during an attack on a military facility, a United Nations spokeswoman said on Friday.
According to Algarzali, her family and friends did not know she was working at Rann, where she was abducted, as they thought she was working at Gamboru Ngala.
"Aid workers put their lives on the line every single day to provide emergency assistance to vulnerable women, children, and men", the UN Humanitarian Coordinator in Nigeria Edward Kallon had said.
The statement added that the troops also extricated 194 civilians held captive by the insurgents and also destroyed makeshift accommodations erected by them.More news: Look Back at Jennifer Lawrence's Oscars Red Carpet Fashion
"Madagali is closed to Sambisa but there seems to be no major operations to clear-off the remnants of Boko Haram that keep ravaging". And a female nurse is missing.
Meanwhile, the main opposition Peoples Democratic Party has condemned the murderous assault on Rann.
Last month, militants kidnapped 110 girls from a school in the northeastern town of Dapchi.
The UNICEF communications head said a statement will be issued soon by the world body. "Nigerians have become tired, despondent and disappointed as insurgents, murderers and marauders rove our land while the Buhari Presidency engaged in cosmetic reactions. These developments are being alleged to have emboldened acts of terrorism in the country".
The UN chief recalled that attacks targeting civilians and civilian infrastructure violate worldwide humanitarian law.
The insurgents were said to have abducted a yet-to-be ascertained number of people, including Leman.
Buhari also sympathised with the United Nations and other humanitarian agencies working at Rann, and in other parts of the country.