"The Yemeni port (of Hudaida) is a lifeline for the delivery of aid and the Coalition's air attacks can kill many more people over time through starvation and hunger when damaging such civilian infrastructure", Dieng said in a statement.
"We're still treating people on the scene and transporting them to the hospital", he said.
He added that engineering teams are working at a fast pace to remove the mines which the Houthis randomly and heavily planted to delay the army and resistance forces from advancing.
Yemeni rights advocates and relief workers say areas adjacent to the airport in Hodeida are under siege and thousands of people are unable to leave as roads are shut down amid intense fighting.
"We didn't have any food, or drink or anything, not even water", Omar said, standing in a hospital on Friday night beside his wounded son. "He provides a cover for the continued aggression", Houthi spokesman Mohammed Abdul-Salam said on Houthi-run media.
"I treated him on a bus after he was injured in an air strike".
In the light of global efforts to avoid a humanitarian crisis in Hodeidah, a source from the office of UN Special Envoy to Yemen Martin Griffiths uncovered that the diplomat is expected in Sana'a on Saturday for talks with Houthi officials.
Some 70 percent of Yemen's food enters via the port, as well as the bulk of humanitarian aid and fuel supplies, which around two-thirds of the country's 27 million population depends on.
The US "no longer has a choice but to escalate because the alternative is that the coalition suffers heavier casualties and the Houthis keep firing into Saudi Arabia with missiles coming through Hodeidah", Mr Heras said.
Riyadh and Abu Dhabi say the Houthis are a proxy force for Iran, their regional arch-rival.
"Hodeidah is just the beginning, and in some ways the easier battle in what needs to be a larger campaign on Sanaa", the rebel-held capital, he said.
U.S. President Donald Trump's withdrawal from Iran's nuclear deal and his embrace of nuclear state North Korea have added to Tehran's isolation and put pressure on the Islamic Republic to preserve its interests in Yemen and other Arab states.
The US has tried to insist they aren't providing any direct assistance in the Hodeidah offensive, though Pentagon officials previously confirmed that they would be helping with targeting selection for airstrikes against the city. Instead, they say they took power in a popular revolt and are defending Yemen from invasion by its neighbours.
Yemeni military announce capture of airport from Houthi rebels, as United Nations special adviser warns of risk of starvation. The coalition air campaign and Houthi bombardment have left more than 10,000 people dead and 2 million displaced, and devastated the country's already fragile infrastructure, including the health sector, which has helped spawn a cholera epidemic. If the Houthis are pushed out, the coalition could get the upper hand in the war. The resilient Houthis, highly experienced in mountain warfare, have advanced on sandal-shod feet and by pick-up truck in battles across Yemen.
An global rights group has urged the United Nations Security Council to warn parties to the Yemen war that they will face sanctions if they fail to provide civilians access to desperately needed aid.
On Wednesday, Yemeni forces and the Saudi-led coalition launched a major operation aimed at retaking Al-Hudeidah - along with its strategic seaport - from the Houthis, who captured it in late 2014.