Yemen has been wracked by conflict since 2014, when Shiite Houthi rebels overran much of the country.
More than 50 Houthi rebels were killed during helicopter shelling and ground fighting within the past 24 hours, medical sources based in Hodeidah confirmed to Xinhua. "Today not more than 40 percent of the children throughout Yemen are being vaccinated", he said.
Geert Cappelaere also told The Associated Press in an interview from Yemen that a USA call for a cease-fire is imperative to end the "brutal war".
The UN has called Yemen, long the poorest country in the Arab world, the largest humanitarian crisis in the world, and warned that 14 million people across the country face imminent starvation.
He said during a telephone call with Yemeni military commander Abdulkarim al-Sadey that the Houthis will be defeated in the Maran region, adding that victory was near.
He visited the Red Sea port city of Hodeida and the rebel-held capital, Sanaa, over the past two days as clashes and airstrikes intensified.
According to a press statement released by the Giants Brigades, elite anti-bomb disposal units supported by the Saudi Arabia-led coalition succeeded in defusing hundreds of landmines and explosives that had been planted by the Houthi fighters in Hodeidah in various locations.
And Hollywood star Angelina Jolie, a special envoy for the United Nations refugee agency (UNHCR), appealed for an immediate ceasefire.
Red Dead Redemption 2 Had The Biggest Opening Weekend In Entertainment History
The massive opening sales has officially put the game up on Grand Theft Auto V's level. The dust has settled, and " Red Dead Redemption 2" has slipped away with the cash.
Earlier in the day, Guterres had called for a halt to violence in Yemen to pull the country back from a "precipice" and build momentum toward talks on ending the war.
Without resolution to ongoing conflict, Yemen could face world's "worst famine" for decades, Antonio Guterres says.
According to the World Health Organization, almost 10,000 people have since been killed.
"The only way to enable refugees to return home, and to bring down the overall numbers worldwide, is to end conflicts themselves".
After UN-backed peace talks collapsed in September, the coalition announced it was relaunching an assault on Hodeida.
Later on Wednesday, Yemeni security and medical officials said an airstrike by a Saudi-led coalition killed five civilians and wounded eight more just south of Hodeida.
The coalition has imposed a blockade on the port, however, allegedly as part of efforts to prevent the Houthis from using it as a landing point for weapons supplied by Iran.
Leading a coalition of its allies, including the United Arab Emirates and Sudan, Saudi Arabia invaded Yemen in March 2015 in an attempt to reinstall Yemen's former president Abd Rabbuh Mansur Hadi, who resigned amid popular discontent and fled to the Arab kingdom.