The United States strongly opposes discontinuing support to the Saudi-led coalition in Yemen's war and will remain engaged in efforts to combat Iranian influence and Islamist militancy in the Arab state, a State Department official said.

Key points: The US last month halted refuelling of aircraft from the coalition, blamed for air strikes that have killed thousands of civilians in Yemen

The US last month halted refuelling of aircraft from the coalition, blamed for air strikes that have killed thousands of civilians in Yemen Peace talks are underway to address what is largely seen in the region as a proxy war between Riyadh and Tehran

Peace talks are underway to address what is largely seen in the region as a proxy war between Riyadh and Tehran The country is near one of the most important trade routes in the world for oil tankers

The US administration has come under pressure at home over the nearly four-year-old conflict that has pushed Yemen to the brink of starvation since the murder of Washington Post columnist Jamal Khashoggi at Saudi Arabia's consulate in Istanbul, Turkey.

The US Senate last month voted to advance a resolution to end military support, which includes arms sales and intelligence sharing, for the Western-backed Sunni Muslim coalition that intervened in 2015 against the Iranian-aligned Houthis to restore the internationally recognised government.

"Obviously there are pressures in our system … to either withdraw from the conflict or discontinue our support of the coalition, which we are strongly opposed to on the administration side," said Timothy Lenderking, Deputy Assistant Secretary for Arabian Gulf Affairs.

"We do believe that the support for the coalition is necessary. It sends a wrong message if we discontinue our support."

The Trump administration last month halted US refuelling of aircraft from the coalition, which has been blamed for air strikes that have killed thousands of civilians in Yemen.

Children walk on the rubble of a house which was destroyed by conflict in the Old City of Sanaa. ( Supplied: Shabia Mantoo/UNHCR, file photo )

Mr Lenderking said UN-sponsored peace talks between the warring parties that started last week in Sweden, the first in two years, were a "vital first step" in ending the conflict that has killed tens of thousands of people.

"Looking down the road we seek a stable and unified Yemen that fosters rather than drains regional and global stability," he said.

"There is no place in a future Yemen for an Iranian-backed threat to Saudi Arabia, the United Arab Emirates (UAE) and vital international economic quarters," he said, adding that the coalition was also combating Al Qaeda and Islamic State militants in Yemen.

The Arabian Peninsula country lies beside the southern mouth of the Red Sea, one of the most important trade routes in the world for oil tankers.

The conflict, seen largely in the region as a proxy war between Riyadh and Tehran, pits the Houthi movement against other Yemeni forces loyal to the government of Abd-Rabbu Mansour Hadi, backed by the coalition led by Saudi Arabia and the UAE.

The Houthis, who have fired missiles on Saudi cities, control the capital Sanaa, after ousting Mr Hadi's government from there in 2014, and the most populous areas of the country.

Reuters