U.S. Secretary of State Mike Pompeo, center, arrives for a meeting of the US and the E3 at the Europa building, Monday, May 13, 2019. The EU backers of the Iran nuclear deal meet with U.S. Secretary of State Mike Pompeo to discuss ways to keep the pact afloat. (AP Photo/Virginia Mayo)

BRUSSELS (AP) — European foreign ministers urged the United States and Iran to show restraint Monday amid fears of tensions tipping them easily into armed conflict, while Secretary of State Mike Pompeo briefed his counterparts on the threats Washington sees emanating from the Islamic republic.

The foreign ministers of Britain, France and Germany, joined by the European Union's foreign policy chief, made the appeal after Saudi Arabia said two oil tankers were sabotaged Sunday off the coast of the United Arab Emirates, one as it was heading to pick up Saudi oil to take to the United States.

Washington has warned shipping companies that "Iran or its proxies" could be targeting maritime traffic in the Persian Gulf region and said it was deploying an aircraft carrier and B-52 bombers there to counter alleged threats from Tehran.

European countries that were co-signatories to a nuclear accord between Tehran and six world powers have been racing to salvage the deal since the U.S. pulled out last year. The foreign ministers of Britain, France and Germany, parties to Iran agreement, and EU foreign policy chief Federica Mogherini, who supervises the way the 2015 agreement is enacted, met in Brussels on Monday.

"We are very worried about the risk of a conflict happening by accident, with an escalation that is unintended really on either side but ends with some kind of conflict," British Foreign Secretary Jeremy Hunt told reporters.

"What we need is a period of calm to make sure that everyone understands what the other side is thinking," Hunt said.

In withdrawing from the nuclear accord, the U.S. said the agreement did nothing to stop Iran from developing missiles or destabilizing the Middle East. The Europeans insist the agreement was never meant to address those issues but has been effective in curbing Tehran's nuclear ambitions.

Tensions mounted last week, when Iranian President Hassan Rouhani gave the remaining signatories 60 days to come up with a plan to shield his country from sanctions imposed by U.S. President Donald Trump after the U.S. withdrew from the deal.

French Foreign Minister Jean-Yves Le Drian described the remarks suggesting that Iran might renege on the agreement as "very worrying," given that the EU is still respecting the deal and trying to keep financial supply lines open to Tehran to bolster its economy.

U.S. Iran envoy Brian Hook told reporters traveling with Pompeo that in Brussels, the secretary of state "shared information and intelligence with allies" since "Europe shares our concerns about stability in the Gulf and the Middle East."

"The secretary wanted to share some detail behind what we have been saying publicly. We believe that Iran should try talks instead of threats. They have chosen poorly by focusing on threats," Hook said.

Mogherini said Pompeo "heard clearly" in Brussels that "we are living a crucial, delicate moment, where the most responsible attitude to take is, and we believe should be, that of maximum restraint and avoiding any escalation on a military side."

She and Hook said the reported attacks on the two tankers had been discussed, but neither linked the incidents to Iran.

German Foreign Minister Heiko Maas said the Europeans underlined to Pompeo the importance of nuclear deal.

"I don't see that there's a better one, or any proposals for a better agreement," Maas said. "That's why I think it's responsible to hold onto what one has and do everything to prevent the situation there from escalating further."

As the U.S. sanctions bite, domestic pressure is increasing on Rouhani to demonstrate that Iran can still benefit from an agreement based on providing it with economic opportunities in exchange for limiting nuclear development.

Maas said the Europeans "are working on the assumption that Iran won't withdraw step by step from this treaty, but rather meet all of its commitments."

Despite the tensions, the Europeans insist only the International Atomic Energy Agency can judge whether Iran remains in compliance with the nuclear agreement.

Inspectors from the agency have issued more than a dozen reports showing Tehran has held up its end of the deal so far. A new report is due at the end of May.

Pompeo was due to travel Tuesday to Russia for talks with Russian Foreign Minister Sergey Lavrov in Sochi.

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Associated Press writers Matthew Lee in Washington, Frank Jordans in Berlin and Nataliya Vasilyeva in Moscow contributed to this report.

From left, European Union foreign policy chief Federica Mogherini, French Foreign Minister Jean-Yves Le Drian, German Foreign Minister Heiko Maas and British Foreign Secretary Jeremy Hunt pose for a photo prior to a meeting at the European Council in Brussels, Monday, May 13, 2019. (Francois Lenoir, Pool Photo via AP)
U.S. Secretary of State Mike Pompeo, left, poses with Britain's Foreign Secretary Jeremy Hunt at the European Council in Brussels, Monday, May 13, 2019.  Secretary of State Mike Pompeo has changed the schedule for his latest trip to Europe, substituting a stop in Brussels for one in Moscow to discuss Iran and other issues with European officials. State Department spokesman Morgan Ortagus says Pompeo is still expected to meet Tuesday in Sochi with Russian President Vladimir Putin and Foreign Minister Sergey Lavrov. (Francois Lenoir/Pool Photo via AP)
British Foreign Secretary Jeremy Hunt, center, arrives for a group photo of EU foreign ministers and their Eastern partner countries at the Europa building in Brussels, Monday, May 13, 2019. (AP Photo/Francisco Seco)
U.S. Secretary of State Mike Pompeo arrives for a meeting with European foreign ministers at the Europa building in Brussels, Monday, May 13, 2019. The EU backers of the Iran nuclear deal meet with U.S. Secretary of State Mike Pompeo to discuss ways to keep the pact afloat. (AP Photo/Francisco Seco)
French Foreign Minister Jean-Yves Le Drian, right, speaks with German counterpart Heiko Maas, center, and British Foreign Secretary Jeremy Hunt during a meeting at the European Council in Brussels, Monday, May 13, 2019. (Francois Lenoir, Pool Photo via AP)
French Foreign Minister Jean-Yves Le Drian speaks with the media as he arrives for a meeting with European foreign ministers at the Europa building in Brussels, Monday, May 13, 2019. The EU backers of the Iran nuclear deal meet with U.S. Secretary of State Mike Pompeo Monday to discuss ways to keep the pact afloat. (AP Photo/Virginia Mayo)
U.S. Secretary of State Mike Pompeo, center, leaves after a meeting at the Europa building in Brussels, Monday, May 13, 2019. (AP Photo/Francisco Seco)
European Union foreign policy chief Federica Mogherini waits for the start of a round table meeting of EU foreign ministers and Eastern Partnership nations at the Europa building, Monday, May 13, 2019. (AP Photo/Virginia Mayo)
European Union foreign policy chief Federica Mogherini, right, speaks with Spanish Foreign Minister Josep Borrell, center, during a meeting of EU foreign ministers at the Europa building in Brussels, Monday, May 13, 2019. (AP Photo/Francisco Seco)
British Foreign Secretary Jeremy Hunt, left, waits for the start of a meeting at the European Council in Brussels, Monday, May 13, 2019. (Francois Lenoir, Pool Photo via AP)
French Foreign Minister Jean-Yves Le Drian, left, and German counterpart Heiko Maas arrive for a meeting at the European Council in Brussels, Monday, May 13, 2019. (Francois Lenoir, Pool Photo via AP)
U.S. Secretary of State Mike Pompeo, left, poses with Britain's Foreign Secretary Jeremy Hunt at the European Council in Brussels, Monday, May 13, 2019.  Secretary of State Mike Pompeo has changed the schedule for his latest trip to Europe, substituting a stop in Brussels for one in Moscow to discuss Iran and other issues with European officials. State Department spokesman Morgan Ortagus says Pompeo is still expected to meet Tuesday in Sochi with Russian President Vladimir Putin and Foreign Minister Sergey Lavrov. (Francois Lenoir/Pool Photo via AP)
British Foreign Secretary Jeremy Hunt, center, shakes hands with Britain's ambassador to the European Union Tim Barrow, right, after a meeting with European foreign ministers at the Europa building in Brussels, Monday, May 13, 2019. (AP Photo/Virginia Mayo)