US Secretary of State Mike Pompeo said the US remains "deeply concerned about Iran's dangerous escalation threats to Israel and the region" and expressed his support for Israel "in this fight" during a visit to Tel Aviv.
US Secretary of State Mike Pompeo on Sunday gave a warm boost of support to Israel in its standoff against Iran, saying "the United States is with Israel in this fight."
Pompeo has been using the Middle East leg of his first trip abroad as America's top diplomat to call for concerted international action to punish Iran for its missile programs.
The tough line was welcomed in Israel, which considers Iran its greatest threat and has been leading calls for the international community to revise its 2015 nuclear deal with Iran. He arrived after visiting Saudi Arabia, another fierce rival of Iran.
"We remain deeply concerned about Iran's dangerous escalation of threats to Israel and the region and Iran's ambition to dominate the Middle East remains," Pompeo said after a nearly two-hour meeting with Israeli Prime Minister Benjamin Netanyahu. "The United States is with Israel in this fight."
Israel has called for tough international action against Iran, citing its hostile rhetoric, support for anti-Israel militant groups and development of long-range missiles.
It also has complained the 2015 nuclear deal does not do enough to prevent Iran from developing a nuclear-weapons capability, and expressed growing concerns about Iran's involvement in the civil war in neighbouring Syria. It says it will not allow Iran to establish a permanent military presence in Syria, fearing the Iranians will launch attacks.
President Donald Trump is to decide by May 12 whether to remain in the nuclear deal. Pompeo repeated the Trump position that "if we can't fix it, he is going to withdraw."
Netanyahu welcomed the tough US line.
"Iran must be stopped, its quest for a nuclear bomb must be stopped, its aggression must be stopped and we're committed to stopping it together," he said.
Talking tough in Riyadh
Earlier in Saudi Arabia, Pompeo also took aim at Iran where he accused Iran of destabilising the Middle East, including through its support for Syria's regime leader Bashar al Assad and for Shia rebels in Yemen.
"(Iran) supports proxy militias and terrorist groups. It is an arms dealer to the Houthi rebels in Yemen and Iran conducts cyber-hacking campaigns. And it supports the murderous Assad regime," Pompeo said at a joint press conference with Saudi Foreign Minister Adel al Jubeir.
"Unlike the prior administration we will not neglect the vast scope of Iran's terrorism."
Trump is due to decide on May 12 whether to reimpose sanctions on Tehran, putting in peril a landmark 2015 nuclear accord which most world powers see as key to preventing Tehran from gaining atomic weapons.
But Trump and America's Middle East allies argue the deal, approved by Trump's predecessor Barack Obama, was too weak and needs to be replaced with a more permanent arrangement and supplemented by controls on Iran's missile program.
'Support for terrorism'
Jubeir said Riyadh supports "efforts aimed at improving the nuclear deal" and called for further sanctions against Iran for its "violations of international decisions on ballistic missiles, its support for terrorism and its interference in the affairs of countries in the region."
Pompeo said the nuclear deal "in its current form" does not do enough to make sure Iran never possesses atomic weapons, and again suggested Trump was ready to nix the agreement.
"We will continue to work with our European allies to fix that deal, but if a deal cannot be reached, the president has said he will leave that deal," he said.
President Emmanuel Macron of France and Chancellor Angela Merkel of Germany left Washington this week after talks with Trump which failed to secure any promise to keep the deal alive.
That may be music to the ears of Saudi and Israeli leaders, who support a tougher line on Iran.
"This administration has made it a priority to address Iran's missile programmes," a senior US official told reporters in Riyadh, condemning missile attacks by Yemen's Tehran-backed Houthi rebels on Saudi Arabia.
The latest volley of missiles - which are in part a response to Saudi air strikes in rebel-held parts of Yemen - was fired across the border shortly before Pompeo touched down in Riyadh.
Yemen missile strikes
US officials travelling with Pompeo told reporters the missiles had been supplied by Iran, citing the attacks as evidence that regional powers should work together.
"Iran supplies the missiles that the Houthis fire into Saudi Arabia, threatening civilians," he said. "Today alone the Saudis shot down four Houthi missiles, the latest in a string of such attacks."
Saudi leaders will welcome US solidarity against Iran, just as Israel will want to see greater US support for its efforts against Iranian influence in Syria and Lebanon.
But Pompeo has come with requests too.
US officials have said that while Riyadh has a right to self-defence, it must come to see that any solution to Yemen's civil war will be a political one and that Saudi-led coalition forces must not exacerbate the massive humanitarian crisis there.
Washington also wants to see an end to the Gulf crisis that has seen Saudi Arabia and regional allies impose a diplomatic and trade embargo on fellow US ally Qatar.
And, perhaps most importantly for Trump, Pompeo will urge Saudi Arabia to provide personnel and funding to help US efforts to stabilise northeastern Syria and defeat the remnants of the Islamic State group.
"The president has made clear that he wants to see meaningful participation from states in the region," said another senior US official travelling with Pompeo.
The United States has more than 2,000 troops in Syria.
On Qatar, the US officials said they do not blame one side or the other, but want Riyadh and Doha to resolve the stand-off themselves.
Pompeo will conclude his first diplomatic trip on Monday after talks with senior Jordanian officials, then fly back to Washington to move into his office in the State Department.