The US has called for a swift cessation of hostilities in Yemen, where three years of civil war have caused the world’s worst humanitarian crisis.
Defence Secretary James Mattis said all parties needed to take part in UN-led peace talks within the next 30 days.
Secretary of State Mike Pompeo meanwhile urged the Saudi-led coalition battling the rebel Houthi movement to end its air strikes on populated areas.
The US has faced growing pressure to end its support for the coalition.
UN human rights experts say coalition forces may have committed war crimes in Yemen and humanitarian organisations say their partial blockade of the country has helped push 14 million people to the brink of famine.
The murder of the US-based journalist Jamal Khashoggi by Saudi agents in Istanbul this month has also strained ties between Washington and Riyadh.
