houthis

So far, the fighting has stayed in Hodeidah's outskirts. But the relative calm isn't likely to last — and aid groups are desperately calling for its port to stay open for a country already in crisis.

The U.N. pulled foreign staff from Hodeidah amid efforts to avert an attack by pro-government forces backed by the United Arab Emirates. A shutdown of the port could put hundreds of thousands at risk.

Yemen's Houthi rebels, who are fighting a Saudi-led coalition, said Tuesday they aimed at a royal palace in the Saudi kingdom. Videos appear to show the missile exploding in midair over Riyadh.

Aid workers are still reporting difficulty providing food and medical assistance to almost 20 million people after the Saudis agreed to lift a blockade of land, air and sea routes into Yemen Monday.

The strike was reportedly one of a number in and around Sanaa. Blame has been put on the Saudi-led coalition backing the internationally recognized government of exiled leader Abed Rabbo Mansour Hadi.

Despite the U.S. strike, the Obama administration still hopes to keep America's role in Yemen's war offshore, with Saudi Arabia and other Arab militaries doing the actual fighting.

The group deemed six facilities "unsafe" after a hospital was hit by a Saudi-led- coalition airstrike and said it has lost confidence in the coalition's "ability to prevent such fatal attacks."

The Cold War-era rocket, which appeared to be targeted at a major air base in the kingdom's south, was brought down by Patriot missiles, officials say.

The temporary truce comes amid an upsurge in Saudi-led airstrikes, including one in the capital that hit the private residence of former President Ali Abdullah Saleh, said to be a rebel ally.

Saudi Arabia says the cease-fire will help get much-needed humanitarian aid into Yemen, but the offer is good only if Houthi rebels comply with the deal.