Russia's war in Ukraine has fuelled a global food crisis and soaring fertiliser prices, according to the UN.

Across rice farms in this Indian Ocean island, the bleak picture is emerging that the summer harvest could be as low as half that of previous years, according to experts.

Facilitating Russian food and grain exports is a key part of attempts by UN and Turkish officials to broker a package deal with Moscow that would also allow for shipments of Ukraine grain from the Black Sea port of Odesa.