The United States is speeding up arms supplies to a Saudi-led coalition battling Houthi fighters in Yemen, who are supported by Iran, Deputy Secretary of State Antony Blinken said on 7 April.

Speaking to reporters on a visit to Riyadh, Blinken called for all political parties to commit to what he called a consensus political solution, and said Washington was stepping up intelligence sharing with the anti-Houthi alliance.

"Saudi Arabia is sending a strong message to the Houthis and their allies that they cannot overrun Yemen by force," he said, referring to Riyadh's leadership of a military campaign by several Arab states to prevent the Houthis from seizing Yemen.

"As part of that effort, we have expedited weapons deliveries, we have increased our intelligence sharing, and we have established a joint coordination planning cell in the Saudi operation centre."

The United States has about a dozen personnel working in the joint coordination planning cell.

Warplanes from Saudi Arabia and Arab allies have been striking Shi'ite Muslim rebels fighting to oust US-allied Yemeni President Abd-Rabbu Mansour Hadi, in an attempt by the regional heavyweight to check Iranian influence in its backyard.

Sunni-ruled Gulf states aim to use military pressure to push the Houthis to resume a UN-backed political transition led by Hadi that was interrupted by the group's seizure of the Yemen capital Sana'a in September.

Their takeover angered Riyadh, which sees the once obscure Zaydi Shi'ite group from the northern highlands as terrorists.