US President Donald Trump on Wednesday warned Iran of a forceful military response after American bases in Jordan came under missile attack, saying the United States would retaliate "hard" following what the US military described as an attempted surprise strike.

Iran's Islamic Revolution Guard Corps said it targeted a U.S. air base and central command in Jordan with ballistic missiles.

Regional war continues to expand as new attacks are reported in Iraq and Jordan.

President Donald Trump vowed a strong military response against Iran for their surprise attack on U.S. troops in Jordan on Tuesday.