U.S. Secretary of State Mike Pompeo arrives Wednesday night, September 18, at the Red Sea coastal city of Jeddah.

Pompeo says, while en route to Saudi Arabia that the oil facilities’ attack is an “act of war,” according several media reports.

"We were blessed there were no Americans killed in this attack, but anytime you have an act of war of this nature, there’s always a risk, that could happen,” says Pompeo, according to a twitter statement.

Saudi Arabia alleges that Iran is responsible for the attack by drones and cruise missiles.

Pompeo’s Saudi trip comes after last weekend’s attack on Saudi oil facilities that he has says is putting the global energy supply at risk. He will be meeting with Saudi Crown Prince Mohammed bin Salman.

The United States alleges Iran has launched the attack that Yemen's Houthi rebels earlier claimed as a reaction to the long Saudi-led war there that has killed thousands of people.

Pompeo will travel to the United Arab Emirates on Thursday to meet Abu Dhabi's crown prince, Sheikh Mohammed bin Zayed Al Nahyan.

Both Saudi Arabia and the United Arab Emirates are U.S. allies and have been fighting against the Houthis in Yemen.

Meanwhile, the state-run Saudi Press Agency issues a statement Wednesday saying its country has joined a U.S.-led naval coalition to secure the Mideast's waterways, with Australia, Bahrain, and the United Kingdom already in the mission.