President Joe Biden warned Prime Minister Benjamin Netanyahu the US will not take part in a counter-offensive against Iran if Israel decides to retaliate for a mass drone and missile attack on Israeli territory overnight, a White House official said. The threat of open warfare erupting between the arch Middle East foes and dragging in the United States has put the region on edge, triggering calls for restraint from global powers and Arab nations to avoid further escalation. US media reported earlier on Sunday that Biden had informed Netanyahu he would not participate in retaliatory action in a phone call overnight. The remarks were confirmed to Reuters by a White House official. The US will continue to help Israel defend itself, but does not want war, John Kirby, the White House’s top national security spokesperson, told ABC’s “This Week” program on Sunday. Iran launched the attack over a suspected Israeli strike on its consulate in Syria on April 1 that killed top Revolutionary Guards commanders and followed months of clashes between Israel and Iran’s regional allies, triggered by the war in Gaza. However, the attack from more than 300 missiles and drones, mostly launched from inside Iran, caused only modest damage in Israel as most were shot down with the help of the US, Britain and Jordan. An Air Force base in southern Israel was hit, but continued to operate as normal and a 7-year old child was seriously hurt by shrapnel. There were no other reports of serious damage. Two senior Israeli ministers signalled on Sunday that retaliation by Israel is not imminent and it would not act alone. “We will build a regional coalition and exact the price from Iran in the fashion and timing that is right for us,” centrist minister Benny Gantz said ahead of a war cabinet meeting. Defence Minister Yoav Gallant also said Israel had an opportunity to form a strategic alliance against “against this grave threat by Iran which is threatening to mount nuclear explosives on these missiles, which could be an extremely grave threat,” he said. Iran denies seeking nuclear weapons. Iranian army chief of staff Major General Mohammad Bagheri warned on television that “our response will be much larger than Sunday’s military action if Israel retaliates against Iran” and told Washington its bases could also be attacked if it helped Israel retaliate. Iranian Foreign Minister Amir Abdollahian said Tehran had informed the United States its attack on Israel would be “limited” and for self defence and that regional neighbours had also been informed of its planned strikes 72-hours in advance. A Turkish diplomatic source said Iran had informed Turkey in advance of what would happen. Iran said the attack was aimed at punishing “Israeli crimes” but it now “deemed the matter concluded.” Russia, China, France and Germany as well as Arab states Egypt, Qatar and the United Arab Emirates urged restraint and the U.N. Security Council was set to meet at 4 p.m. ET (2000 GMT) on Sunday. “We will do everything to stop a further escalation,” German Chancellor Olaf Scholz said on a visit to China. “We can only warn everyone, especially Iran, against continuing this way.” Turkey also warned Iran it did not want further tension in the region. Analysts debated how far Iran’s attack was calibrated to cause genuine devastation in Israel, or to save face at home after vows of revenge while avoiding a major new war. “I think the Iranians took into consideration the fact that Israel has a very, very strong multi-layer anti-missile system and they probably took into consideration that there will not be too many casualties,” said Sima Shine, a former senior Mossad official at the Institute for National Security Studies in Tel Aviv.