U.S. Secretary of State John Kerry flew in to Riyadh on May 6 for talks with Saudi and Yemeni leaders on the worsening conflict in Yemen.
Kerry said he is seeking a "humanitarian pause" in the fighting because "the situation is getting more dire by the day."
Prior to his arrival, Kerry did not discuss Yemen's bid to invite foreign forces into a ground war in the country in a letter to the UN Security Council. But he planned to meet with exiled Yemeni President Abd-Rabbuh Mansur Hadi in the Saudi capital, where he has resided since he was ousted by Huthi rebels.
While Kerry hopes for a pause in the conflict, the fighting has only intensified recently.
Huthi forces have tightened their control of Aden, a crucial port city, and have been firing rockets across the border into Saudi Arabia, which has led an air bombing campaign against them since March.
Shelling by the Huthis killed five Saudis in the border city of Najran, in their first attack on a Saudi city during the conflict.
Meanwhile, Saudi-led coalition forces were seen fighting on the ground for the first time in Aden this week.