According to Axios, President Trump gave Saudi Crown Prince Mohammed bin Salman his backing for Monday’s military strikes against the Iran-backed Houthis.

U.S. officials said Saudi Arabia sought U.S. support after raising concerns last week about the deteriorating security situation.

The Saudi strike on Sanaa International Airport came after a Mahan Air flight carrying a Houthi delegation returned from Iran. A U.S. official said the aircraft was also carrying weapons, missile parts, and military experts.

The Houthis responded by launching ballistic missiles and drones at Abha International Airport in southwestern Saudi Arabia.