Two South African mine-clearing experts have been killed in an accidental explosion in Yemen, a Saudi-funded charity has said.

They were travelling in a vehicle that blew up in the city of Marib on Sunday while carrying mines to be destroyed. Three other de-mining experts travelling with them - one Croatian, one Bosnian and one Kosovan - also died in the blast.

A Briton was also hurt, according to the King Salman Humanitarian Aid and Relief Centre.

The mines had allegedly been planted by the rebel Houthi movement, which has been battling the Saudi-backed government since 2015.

Since then, at least 6,800 civilians have been killed and 10,700 injured in the fighting, according to the UN. Thousands more civilians have died from preventable causes, including malnutrition, disease and poor health.