The US believes Iran may attack Israel from inside its territory as Tehran officials constantly vow revenge for the deaths of top IRGC generals in an Israeli strike in Damascus, CNN reported.

“The US had observed Iran moving military assets around internally, including drones and cruise missiles, signaling that it was preparing to attack Israeli targets from inside its own territory,” the report quoted two informed sources as saying.

According to one CNN source, Iran has recently been tracked to have readied around 100 cruise missiles. “It was not clear whether Iran was preparing to strike from its soil as part of an initial attack, or if it was posturing to try to deter Israel or the United States from conducting a possible counter strike on its territory,” the report added.

Washington also believes that Tehran might involve its regional proxies in its retaliatory attack and that the potential targets can be both on the Israeli soil and abroad, the CNN said.

Earlier on Friday, the White House confirmed that Iran’s threats against Israel are “real,” “viable” and “credible.”

Meanwhile, US President Joe Biden told reporters that Iran’s reprisals would occur “sooner than later,” but the regime “will not succeed” as Washington is committed to Israel’s security and will help it defend itself against threats.

On April 1, Israel launched a precision missile strike on Iran's consulate building in Damascus, killing 7 IRGC forces, including Mohammad Reza Zahedi, the highest-ranking commander of the Iranian Revolutionary Guards Quds Force (IRGC-QF) in Lebanon and Syria. Since then, Supreme Leader Ali Khamenei and other senior Iranian officials have vowed revenge against Israel.