Six weeks ago, warring parties in Yemen began a ceasefire in the port city of Hudaydah, which is a gateway for supplies - in particular food aid - into the country.

It is one of the areas controlled by Houthi rebels, but since June had been under assault by a Saudi-led coalition backing the pro-government troops.

The desperately fragile, uncertain truce in Hudaydah continues.

But as the BBC's Lyse Doucet reports, it has done nothing so far to ease fears of a famine.