U.S. President Donald Trump warned on Sunday that any attack against the U.S. will be met with the "full strength and might" of the U.S. military.

Israel said hundreds of airstrikes over the past two days killed nine senior scientists and experts involved in Iran’s nuclear program, in addition to several top generals.

Japan has condemned Israel's strikes by calling them escalatory while the U.S. has called those a form of "unilateral action" and said Washington was not involved.

Russian President Vladimir Putin called President Donald Trump to wish him a happy birthday and speak about the escalating conflict in the Middle East on Saturday. Putin spoke with Trump about the Russian president’s conversations with the leaders of Iran and Israel as tensions heat up.