More than one million Africans, including South Sudanese, have fled their countries in the last 12 months, according to the UNHCR.

It says half a million have been displaced from South Sudan alone.

UNHCR High Commissioner António Guterres says the global refugee crisis is so great such that the UN refugee agency and other agencies are struggling to respond to, and meet all the humanitarian needs.

He said the world has become more fragile, conflicts have spread in unpredictable ways, and the nature of conflict has grown highly complex.

The Agency’s latest report shows that displacement and refugee exoduses have marked many continents: just in the last 12 months, Yemen has witnessed 1.1 million displaced people and refugees.

An additional half a million people fled from their homes in South Sudan; and in Libya, a further 300,000 are now displaced within the country.

Elsewhere, tens of thousands flee gang violence in Central America, while 94,000 have crossed the Bay of Bengal in search of protection.

Mr. Guterres called for more financial aid for Africa says the situation may worsen if urgent action is not taken.