Geert Cappelaere, regional director for the Middle East and North Africa at UN children's agency UNICEF, called on the warring parties to join proposed peace talks later this month and agree to a ceasefire.
According to UNICEF, 1.8 million Yemeni children under the age of five suffer from acute malnutrition, and the lives of 400,000 severely affected children are under threat. Cappelaere said that 30,000 children die of malnutrition each year in Yemen, while a child dies every 10 minutes from easily preventable diseases.
He said the figures were "a reminder for all of us to realise how dire the situation has become".
"We call on all parties to get together later this month under the leadership of the UN special envoy... and agree on a ceasefire and a road to peace for Yemen," he added.
The appeal came as fighting intensified in the key rebel-held Red Sea port city of Hodeida, despite growing international pressure to end a conflict that has left the country on the brink of famine.
The port is the entry point for more than 70 percent of imports into the impoverished country.
According to the World Health Organization, nearly 10,000 people have since been killed. Some rights groups estimate the toll could be five times higher.
The government said Thursday it was ready to restart peace talks with the Huthis, after a surprise call by the United States for an end to the war, including air strikes by the coalition.
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