Thousands of young children have died of starvation and disease in Boko Haram-ravaged north-eastern Nigeria, Doctors Without Borders said.

Doctors Without Borders have pleaded for access to treat the wounded in the rebel-held part of Aleppo, as Syrian government forces pressed ahead with an offensive that has killed hundreds of people in recent weeks.

Medical aid charity Doctors Without Borders has said it will no longer seek European Union funding in protest against the EU's migrant deal with Turkey.

Doctors Without Borders said it took the wrenching decision not to formally inform Syria’s government or its Russian allies about the location of some medical facilities such as the one hit by a deadly airstrike this week.

A small medical facility in northern Yemen run by Doctors Without Borders has been destroyed by two airstrikes but there were no casualties, the aid group’s chief in the country said.

US special operations analysts knew a site in Kunduz, Afghanistan, which was hit by an airstrike that killed at least 22 people earlier this month was a hospital.

Doctors Without Borders has called for an independent and unprecedented fact-finding mission to investigate a US air strike on a hospital run by the medical aid group in Afghanistan that killed at least 22 people.

Doctors Without Borders is appealing to the United States, Afghanistan and other countries to launch an independent fact-finding mission under rules of the Geneva Conventions into the US air strike on a hospital in Kunduz that killed at least 22 people.

The international charity Doctors Without Borders said at least 16 people including nine local staffers were killed when its clinic came under "sustained bombing" in the northern Afghan city of Kunduz.

At least nine Médecins Sans Frontières (Doctors Without Borders) aid workers were killed in an apparent US air strike on an Afghan hospital, up from an earlier death toll of three.

Three workers from Doctors Without Borders were killed and 30 were missing after an explosion near their hospital in the northern Afghan city of Kunduz that may have been caused by a US airstrike.

An Ebola outbreak that has killed more than 700 people in West Africa is moving faster than efforts to control the disease, the head of the World Health Organisation has warned as presidents from affected countries met in Guinea’s capital.