Thousands of people gathered in Chad's capital N'Djamena on Friday for the state funeral of President Idriss Deby, whose death while leading his troops against a rebel offensive has thrown the country into crisis.

A vaccine against malaria has shown record efficacy in a Phase II trial, a pre-print study released on Friday by Oxford University shows, raising hopes that one of the world's most deadly diseases could be brought under control.

The United Nations Security Council has voiced "deep concern" over a humanitarian crisis in Ethiopia's northern Tigray region for the first time since conflict erupted there five months ago, calling for reported atrocities to be investigated.