内容摘要：Dr Jo Buckberry, from the University of Bradford's School of Archaeological and Forensic Sciences, said: "It's really exciting to work with ancient DNA specialists, to identify diseases than we cannot see on the skeleton.

Dr Jo Buckberry, from the University of Bradford's School of Archaeological and Forensic Sciences, said: "It's really exciting to work with ancient DNA specialists, to identify diseases than we cannot see on the skeleton.

She adds that she would consider going to a private clinic but the cost is prohibitive.Chinwendu Obiejesi, who is expecting her third child, is able to pay for private health care at a hospital and "wouldn't consider giving birth anywhere else".

She says that among her friends and family, maternal deaths are now rare, whereas she used to hear about them quite frequently.She lives in a wealthy suburb of Abuja, where hospitals are easier to reach, roads are better, and emergency services work. More women in the city are also educated and know the importance of going to the hospital."I always attend antenatal care… It allows me to speak with doctors regularly, do important tests and scans, and keep track of both my health and the baby's," Ms Obiejesi tells the BBC.

"For instance, during my second pregnancy, they expected I might bleed heavily, so they prepared extra blood in case a transfusion was needed. Thankfully, I didn't need it, and everything went well."However, a family friend of hers was not so lucky.

During her second labour, "the birth attendant couldn't deliver the baby and tried to force it out. The baby died. By the time she was rushed to the hospital, it was too late. She still had to undergo surgery to deliver the baby's body. It was heart-breaking."

Dr Nana Sandah-Abubakar, director of community health services at the country's National Primary Health Care Development Agency (NPHCDA), acknowledges that the situation is dire, but says a new plan is being put in place to address some of the issues.Born in Germany, he had moved to Israel as a teenager before relocating to Washington, his friend Ronen Shoval said.

He was a "devout Christian" with "good character", Mr Shoval told the BBC.He had also previously served in the Israeli military, Israel's ambassador to Germany, Ron Prosor, said.

Sarah Lynn Milgrim, an American from Kansas, worked for the Israeli embassy's public diplomacy department, according to her LinkedIn page.Her father, Robert, told the BBC's US partner CBS News that his daughter "loved Israel" and "loved everybody that lived in the Middle East".