WATCH: White House holds briefing after U.S., allies launch new strike against Yemen’s Houthis

White House press secretary Karine Jean-Pierre and national security spokesman hold a news briefing as the U.S. and United Kingdom launch new airstrikes against Yemen’s Houthis rebels.

Watch in the player above.

The U.S. and British militaries bombed multiple targets in eight locations used by the Iranian-backed Houthis in Yemen on Monday night, the second time the two allies have conducted coordinated retaliatory strikes on an array of the rebels’ missile-launching capabilities.

According to officials, the U.S. and U.K. used warship- and submarine-launched Tomahawk missiles and fighter jets to take out Houthi missile storage sites, drones and launchers. The officials, who spoke on condition of anonymity to discuss a military operation, said Australia, Bahrain, Canada and the Netherlands contributed to the mission, including with intelligence and surveillance.

In a joint statement, the six allied nations said the strikes specifically targeted a Houthi underground storage site and locations associated with the Houthis’ missile and air surveillance capabilities. They added, “Our aim remains to de-escalate tensions and restore stability in the Red Sea, but let us reiterate our warning to Houthi leadership: we will not hesitate to defend lives and the free flow of commerce in one of the world’s most critical waterways in the face of continued threats.”

The joint operation comes about 10 days after U.S. and British warships and fighter jets struck more than 60 targets in 28 locations. That was the first U.S. military response to what has been a persistent campaign of Houthi drone and missile attacks on commercial ships since the start of the Israel-Hamas war in October.

The Houthis’ media office said in an online statement Monday that raids targeted Sanaa, Yemen’s capital. And Jamal Hassan, a resident from south Sanaa, told The Associated Press that two strikes landed near his home, setting off car alarms in the street. An Associated Press journalist in Sanaa also heard aircraft flying above the skies of Sanaa overnight Monday.