Donald Trump has threatened Tehran with “the biggest attack of them all” after the US launched fresh strikes in Iran on Tuesday.

Several explosions have been heard along the Strait of Hormuz, which come in retaliation for Iranian attacks on shipping and American service members in the Middle East, the US military said.

President Trump is now warning Iran not to hit back at its “large and powerful” strikes, warning that “they will be hit again at a much harder and higher level.

“It will not be the biggest attack of them all, that is waiting in the wings and, when it is over, there will be very little left of the Islamic Republic of Iran,” he added.

But in response to the strikes, IRGC spokesperson Sardar Mohebi said: “Severe punishment awaits the aggressors, and America will regret its new attacks.”

The US fired rocket launchers on Larak Island on Sunday in the first clash in more than a month, causing Iran to retaliate by launching ballistic missiles at American bases in Jordan.

On Monday, President Trump said more strikes might be necessary, telling reporters: “We’ll see what happens.”

Read More: Trump warns of ‘biggest attack of them all’ in threat to Tehran after fresh strikes