Saudi Arabia does not want war but will not hesitate to defend itself against Iran, a top Saudi diplomat said Sunday, after the kingdom's energy sector was targeted this past week amid heightened tensions in the Persian Gulf.

On Sunday night, a rocket crashed in the Iraqi capital's heavily fortified Green Zone, landing less than a mile from the US Embassy, further stoking tensions. No casualties were reported in the apparent attack.

Adel al-Jubeir, the minister of state for foreign affairs, spoke a week after four oil tankers two of them Saudi were targeted in an alleged act of sabotage off the coast of the United Arab Emirates and days after Iran-allied Yemeni rebels claimed a drone attack on a Saudi oil pipeline.

“The kingdom of Saudi Arabia does not want war in the region and does not strive for that... but at the same time, if the other side chooses war, the kingdom will fight this with all force and determination and it will defend itself, its citizens and its interests,” al-Jubeir told reporters.

A senior Iranian military commander was similarly quoted as saying his country is not looking for war, in comments published in Iranian media on Sunday.

Fears of armed conflict were already running high after the White House ordered warships and bombers to the region earlier this month to counter an alleged, unexplained threat from Iran. The US also has ordered nonessential staff out of its diplomatic posts in Iraq.

But President Donald Trump appears to have softened his tone in recent days, saying he expects Iran to seek negotiations with his administration.

Asked on Thursday if the US might be on a path to war with Iran, the president answered, “I hope not.”

Sunday night's apparent rocket attack was the first such incident since September, when three mortar shells landed in an abandoned lot inside the Green Zone.

There was no immediate comment from the State Department or the US Embassy in Iraq on Sunday's attack.

Associated Press reporters on the east side of the Tigris River, opposite the Green Zone, heard an explosion, after which alert sirens sounded briefly in Baghdad.

Iraqi military spokesman Brig. Gen. Yahya Rasoul told The Associated Press that a Katyusha rocket fell near the statue of the Unknown Soldier, less than a mile from the US Embassy.

He said the military is investigating the cause but that the rocket was believed to have been fired from east Baghdad. The area is home to Iran-backed Shiite militias.

As tensions escalate between the US and Iran, there have been concerns that Baghdad could once again get caught in the middle , just as it is on the path to recovery.

The country hosts more than 5,000 US troops, and is home to powerful Iranian-backed militias, some of whom want those US forces to leave.

The US Navy said Sunday it had conducted exercises in the Arabian Sea with the aircraft carrier strike group ordered to the region to counter the unspecified threat from Iran.

The Navy said the exercises and training were conducted Friday and Saturday with the USS Abraham Lincoln aircraft carrier strike group in coordination with the US Marine Corps, highlighting US “lethality and agility to respond to threat,” as well as to deter conflict and preserve US strategic interests.

The current tensions are rooted in Trump's decision last year to withdraw the US from the 2015 nuclear accord between Iran and world powers and impose wide-reaching sanctions, including on Iranian oil exports that are crucial to its economy.

Iran has said it would resume enriching uranium at higher levels if a new nuclear deal is not reached by July 7. That wouldpotentially bring it closer to being able to develop a nuclear weapon, something Iran insists it has never sought.

Energy ministers from OPEC and its allies, including major producers Saudi Arabia and Russia, are meeting in Saudi Arabia on Sunday to discuss energy prices and production cuts. Iran's oil exports are expected to shrink further in the coming months after the US stopped renewing waivers that allowed it to continue selling to some countries.

OPEC and non-OPEC oil producers have production cuts in place, but the group of exporters is not expected to make its decision on output until late June, when they meet again in Vienna.

Saudi Arabia's King Salman, meanwhile, has called for a meeting of Arab heads of state on May 30 in Mecca to discuss the latest developments, including the oil pipeline attack.

The kingdom has blamed the pipeline attack on Iran, accusing Tehran of arming the rebel Houthis, which a Saudi-led coalition has been at war with in Yemen since 2015. Iran denies arming or training the rebels, who control much of northern Yemen, including the capital, Sanaa.

“We want peace and stability in the region, but we won't stand with our hands bound as the Iranians continuously attack. Iran has to understand that,” al-Jubeir said. “The ball is in Iran's court.” Al-Jubeir also noted that an investigation, led by the UAE, into the tanker incident is underway.

The state-run Saudi news agency reported Sunday that US Secretary of State Mike Pompeo called Saudi Crown Prince Mohammed bin Salman to discuss regional developments. There was no immediate statement by the State Department about the call.

An English-language Saudi newspaper close to the palace recently published an editorial calling for surgical US airstrikes in retaliation for Iran's alleged involvement in targeting Saudi Arabia's oil infrastructure.

The head of Iran's Revolutionary Guard, Gen. Hossein Salami, was quoted Sunday as saying Iran is not looking for war. But he said the US is going to fail in the near future “because they are frustrated and hopeless” and are looking for a way out of the current escalation.

His comments, given to other Guard commanders, were carried by Iran's semi-official Fars news agency.