US President Donald Trump says he is yet to decide whether or not he will "finish off" Iran.

Iran's state-run broadcaster reported that the country's army had carried out attacks on US targets The United States said it had launched fresh strikes against Iran on Wednesday evening as President Donald Trump warned Tehran it "better behave". The US military said "Iranian military capabilities used to threaten vessels" moving through the Strait of Hormuz had been targeted, and that it had separately fired on a ship attempting to violate its renewed blockade of Iran's ports. It came after Iran claimed it had struck US military targets in the region, including in Bahrain and Kuwait, as a fifth day of renewed hostilities strained their preliminary deal to end the war. Iran's top negotiator, Mohammad Bagher Ghalibaf, meanwhile told state media Tehran had "no reason" to abide by the deal if it did benefit from it. Trump had threatened late on Tuesday to attack bridges and power plants should Iran not return to talks next week. Asked by reporters late on Wednesday whether he would give a deadline before doing so, he responded: "I ‌don't like giving ​deadlines, but they pretty ⁠much know, they know ​the story... ​they ​better ​behave." He later told delegates at a defence summit that Iran was "not happy right now".