The U.S. military has moved a large number of refueling aircraft to Europe to provide options to President Donald Trump as Middle East tensions erupt into conflict between Iran and Israel, two U.S. officials told Reuters on Monday,

The Israeli military claims its campaign has eliminated high-value targets, including nine senior scientists, and severely damaged Iran’s nuclear infrastructure. Iranian authorities confirmed damage to four critical buildings at the Isfahan uranium conversion facility,

"The full strength and might of the U.S. Armed Forces will come down on you at levels never seen before," Trump warned.

President Trump rejected an Israeli plan in recent days to kill Iran's Supreme Leader Ayatollah Ali Khamenei, a senior U.S. official told USA TODAY.

The strikes came after the Israeli military said it had carried out fresh strikes on Iran nuclear infrastructure sites.

The Iran regime is very weak,” Israeli Prime Minister Benjamin Netanyahu said in a television interview. Israeli struck energy facilities and government buildings Sunday.

A Democratic senator introduced legislation to prevent President Donald Trump from using military force against Iran without Congress's authorization.

Tehran has asked Qatar, Saudi Arabia and Oman to press U.S. President Donald Trump to use his influence on Israel to agree to an immediate ceasefire with Iran in return for Tehran's flexibility in nuclear negotiations,