WASHINGTON - If Iran attacks Qatar again, the US military "will massively blow up the entirety" of the South Pars gas field in Iran, US President Donald Trump warned in a post on his Truth Social on Wednesday.

Trump's remarks came after Iran hit Qatar's liquefied natural gas (LNG) facilities, after Israel launched an attack on Wednesday against Iran's South Pars offshore natural gas field in the Persian Gulf that it shares with Doha.

"The United States knew nothing about this particular attack, and the country of Qatar was in no way, shape, or form, involved with it, nor did it have any idea that it was going to happen," Trump said.

"NO MORE ATTACKS WILL BE MADE BY ISRAEL pertaining to this extremely important and valuable South Pars Field unless Iran unwisely decides to attack" Qatar again, Trump said.

If Iran attacks Qatar again, "the United States of America, with or without the help or consent of Israel, will massively blow up the entirety of the South Pars Gas Field at an amount of strength and power that Iran has never seen or witnessed before," he added.