As strikes on airports in Saudi Arabia turn deadly, Washington debates striking Houthis and restarting strikes on Iran.

Twelve killed, more than 300 injured in Riyadh airport attack

• Saudi Arabia’s civil aviation authority says 12 people were killed and 309 injured in the latest Houthi attack on Riyadh’s King Khalid airport, as the Saudi-led coalition vows to respond.
• The United States, Qatar, Egypt and Oman are among countries that have condemned the deadly attack.