President Donald Trump offered U.S. support for Saudi Arabia’s self-defense in a call on Saturday with Saudi Crown Prince Mohammed Bin Salman, the White House said.

The pair spoke after a swarm of explosive drones hit key oil-industry targets in Saudi Arabia. The state-run Saudi Press Agency earlier reported on the call.

Iranian-backed Houthi rebels in Yemen claimed responsibility for the strikes, which forced Saudi Aramco to cut daily oil production in half.

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