UK Prime Minister Rishi Sunak on Thursday condemned Iran's threats against Israel calling them “unacceptable.” "The threats from Iran are completely unacceptable and we, like the Americans, fully support Israel’s right to defend itself against that," Sunak told broadcasters. "We have already highlighted Iran as a significant risk to regional security and we have always said that we will support Israel’s ability to defend itself and we are taking action ourselves to make sure we can protect the UK against threats from Iran," he added. The British Prime Minister's comments follow US President Joe Biden, who said on Wednesday that his country’s commitment to Israel’s security in the face of Iranian threats was "ironclad." Iran has vowed to retaliate for the assassination of senior Revolutionary Guards (IRGC) official Mohammad Reza Zahedi in Damascus last week, along with other IRGC members. A senior adviser to Supreme Leader Ayatollah Ali Khamenei has threatened Israeli embassies abroad. On Wednesday, Bloomberg reported that the US government believes a "major" missile or drone attack on Israel by Iran or its proxies is "imminent."