EU stands behind Iran nuclear deal, against Trump

The European Union on Monday reaffirmed its support for the 2015 nuclear deal between Iran and world powers despite sharp criticism of the accord by President Donald Trump.

The EU also urged US lawmakers not to reimpose sanctions on Tehran after Trump said he'd leave it up to Congress to decide on the future of the deal.

"As Europeans together, we are very worried that the decision of the US president could lead us back into military confrontation with Iran," German Foreign Minister Sigmar Gabriel told reporters.

EU foreign ministers meeting in Luxembourg said a failure to uphold an international agreement backed by the UN Security Council could have serious consequences for regional peace, and also undermine efforts to check North Korea's nuclear ambitions.

Trump defied both US allies and adversaries on Friday by refusing to formally certify that Tehran is complying with the accord, even though international inspectors say it is, and said he might ultimately terminate the agreement.

The International Atomic Energy Agency (IAEA) says Iran is complying with its commitments under the accord, which Trump has branded "the worst deal ever negotiated."

EU to continue Iran deal

After a closed-door meeting chaired by EU foreign policy chief Federica Mogherini on how best to proceed on the Iran issue, the ministers issued a joint statement saying the 2015 deal was key to preventing the global spread of nuclear weapons.

"The EU is committed to the continued full and effective implementation of all parts of the JCPOA," it said, referring to the 'Joint Comprehensive Plan of Action', the formal name of the accord with Iran agreed in July 2015 in Vienna.

"Non-proliferation is a major element of world security and rupturing that would be extremely damaging," French Foreign Minister Jean-Yves Le Drian told reporters. "We hope that Congress does not put this accord in jeopardy."

Mogherini said she would travel to Washington early next month to try to muster support for the accord.

The EU still has sanctions in place against members of Iran's Islamic Revolutionary Guard Corps, a major target of Trump's criticism.

The EU ministers also discussed on Monday Iran's ballistic missile programme, which they want to see dismantled. Tehran says that programme is purely defensive.

Mogherini said the ministers did not discuss new sanctions on Iran over that programme.

While several EU governments, including the Netherlands and Britain, said Iran's ballistic missiles and Tehran's interventions in Syria and Yemen were a concern, ministers said the immediate focus had to be saving the 2015 deal.

Effects on relationships with North Korea

Negotiated after 12 years of talks that EU diplomats helped to initiate and carry through, the accord with Iran is the most significant diplomatic success for the bloc in several decades.

Many worry that the EU's reputation as an honest broker in a host of future conflicts may not recover if the US Congress reimposes sanctions on Iran and causes the deal - which had the strong backing of Trump's predecessor Barack Obama - to unravel.

Most UN and Western sanctions were lifted more than 18 months ago under the deal, though Tehran is still subject to a UN arms embargo, which is not part of the deal.

EU foreign ministers were also due on Monday to approve a new batch of economic sanctions on North Korea after its atomic test last month, but some still hold out hope of repeating the Iran nuclear deal with Pyongyang at some future date.

Sweden is one of only seven EU countries with an embassy in Pyongyang and its foreign minister, Margot Wallstrom, reiterated that Stockholm could be counted on to help negotiate if asked.

But Germany's Gabriel warned that Trump's decision not to certify the Iran accord could scupper such hopes, a position echoed by Mogherini, although she stressed that no such EU mediation was underway.

"My concern is that, if we want to talk to North Korea now, the possible end for the nuclear dealwith Iran would jeopardise the credibility of such treaties," Gabriel said.