The difficulty of the task was underscored by rebel fighters’ failure to honour a week-long ceasefire in some areas.
The ceasefire, which was scheduled to start at 12pm yesterday, was meant to give the warring factions a chance to find a solution to the conflict that has collapsed the Arab world’s poorest country.
However, rebel shelling and ground clashes continued in the southern Taiz province, according to security officials who remain neutral in the conflict that has splintered the country.
They said air strikes by a Saudi-led coalition targeting the rebels have halted.
Yemen has been torn apart by fighting that pits the rebels, known as Houthis, and army units loyal to former president Ali Abdullah Saleh against an array of forces.
This includes the internationally recognised government backed by the Saudi-led coalition and supported by the US.