"I don't want to get into secure information but my expectation is sooner than later," Biden told reporters when asked how imminent an Iranian attack on Israel would be
As has been reported globally, Tehran vowed revenge after Israel launched airstrikes on the Iranian embassy in the Syrian capital, Damascus, taking out three top military generals
In response to more shouted questions from reporters in the White House, asking if American troops were at risk, Biden returned to the podium saying that the United States was 'devoted' to the defence of Israel, CNN reported
"We are devoted to the defence of Israel. We will support Israel we will help defend Israel and Iran will not succeed," Biden said
The US has been on high alert for a significant Iranian retaliatory attack on Israel in recent days, as fears grow of a wider regional war
There remains a "real, credible and viable" threat of Iran launching strikes, the White House said on Friday, following Israel's attack on an Iranian diplomatic compound in Syria last week, killing three Iranian generals
Biden, who warned this week that Iran was threatening a 'significant attack' on Israel, has been receiving constant updates on the situation from his national security team
The US and several other countries, including India, Britain and France, issued new travel guidelines for government employees in Israel as the Iranian threat loomed
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