Employees work at an installation in Khurais on Saturday. Reuters

The United States announced the deployment of additional American military forces to Saudi Arabia on Friday to bolster the kingdom’s defences after the Sept.14 attack on its oil facilities, which Washington and Riyadh have blamed on Iran.

The large deployment includes fighter squadrons, an air expeditionary wing and air defence personnel, the Pentagon said. Together with the 200 forces to Saudi Arabia announced last month, the deployment totalled about 3,000 troops, it said.

US-Iran tensions have risen to new highs since May 2018, when the Trump administration withdrew from a 2015 international nuclear accord with Tehran that put limits on its nuclear programme in exchange for the easing of sanctions.

As Trump reinstated US sanctions, increasing pressure on the Iranian economy, there have been a series of attacks that Washington and close allies have blamed on Iran, including the attack on the world’s biggest crude oil-processing facility. Iran denies responsibility.

In a bid to better shield Saudi Arabia, the Pentagon said it was sending two additional Patriot batteries and one Terminal High Altitude Area Defence system (THAAD).

US Defence Secretary Mark Esper told reporters the deployments were designed to deter Iran.

“We thought it was important to continue to deploy forces to deter and defend and to send the message to the Iranians: Do not strike another sovereign state, do not threaten American interests, American forces, or we will respond,” Esper told reporters during a press briefing.

Trump said the United States would not bear the expense of the deployment. “Saudi Arabia, at my request, has agreed to pay us for everything we’re doing,” he told reporters.

Some of Trump’s Republican allies have called for retaliatory strikes, which the president has so far declined to carry out.

It was unclear whether some of the newly announced troops might replace other American forces expected to depart the region in the coming weeks or months.

The Pentagon has yet to announce, for example, whether it will replace the aircraft carrier USS Abraham Lincoln and its strike group when it eventually wraps up its deployment to the Middle East.

Esper declined to say whether the carrier, which itself includes thousands of troops and massive firepower, would be replaced.

The deployment is part of a series of what the United States has described as defensive moves following the attack on Saudi Arabia’s oil facilities last month, which rattled global energy markets.

Iran has responded to previous US troop deployments this year with apprehension. It denies responsibility for the attack on Saudi Arabia as well as attacks on oil tankers earlier this year.

Meanwhile, an official spokesman for the Saudi General Directorate of Border Guards said that at 11:47 pm on Friday 12/2/1441, an e-mail was received from the Jeddah Radio containing a letter from the captain of the Iranian vessel, Sabiti, reporting that the front of the vessel has been broken, resulting in an oil spill in the sea from the cargo and tanks of the vessel.

“After analysing the information by the Coordination Centre, in order to provide any necessary assistance, it was found that the vessel continued operating, sailing 67 nautical miles southwest of Jeddah Islamic Port, and has closed the automated tracking system, without responding to the Coordinating Centre’s communications,” he added in a statement carried by the Saudi Press Agency.

“At 15:50, the last position of the vessel was updated to 79 nautical miles, southwest of Jeddah Islamic Port, and 64 nautical miles away from the nearest point of shore, sailing at 9.7 knots to 152 degrees.”

“The Kingdom affirms its commitment to the security and safety of maritime navigation, as well as international agreements and norms,” he concluded.

Also during the day, Saudi Arabia affirmed its commitment to supporting the rule of law, “which promotes respect for international humanitarian law for the betterment of humanity,” reported the Saudi Press Agency.

In a speech before the sixth committee of the 74th session of the UN General Assembly on Friday, the Kingdom said that achieving the rule of law comes through effective multilateral participation.

WAM / Agencies