War-torn Yemen's healthcare system has "in effect collapsed" and coronavirus is spreading across the country, the United Nations has warned.

Jens Laerke, spokesman for the UN Office for the Co-ordination of Humanitarian Affairs (OCHA), described the situation as "extremely alarming".

He said people were being turned away from treatment centres partly because staff lacked protective equipment.

The Yemeni authorities have confirmed scores of infections, and 30 deaths.

But the UN says the real figures are almost certainly much higher.

The country's health system has been damaged by years of civil war and ventilators are in short supply.

Millions of Yemenis homeless; many are malnourished, and most of the population depends on aid.