The United States warned on Saturday it was "more than capable" of resuming war with Iran after President Donald Trump said any peace deal must adhere to his red lines, including Tehran never being able to develop nuclear weapons.

U.S. President Donald Trump on Friday said he was now making a "final" decision on whether or not to strike a peace deal with Iran.

U.S. President Donald Trump said any agreement with Iran would depend on securing a “good deal” for the United States as negotiations over Tehran’s nuclear program intensify alongside continued military tensions in the Gulf.

“A deal that wasn’t going to be good for us is the line,” Trump told Fox News in an interview set to air this weekend. “I negotiate. They negotiate. They’re very good negotiators.”

The United States and Iran have made good progress towards a ceasefire extension deal but President Donald Trump is not yet ready to approve it, U.S. Vice President JD Vance said Thursday.

U.S. and Iranian negotiators have reached an agreement on a 60-day memorandum of understanding to extend the ceasefire and launch negotiations on Iran's nuclear program, but U.S. President Donald Trump has yet to give it his final approval, two U.S. officials and a regional source involved in the mediation efforts told U.S. news portal Axios.

U.S. President Donald Trump said Wednesday he was not yet satisfied with Iran's offers to make a deal, after Iranian state television reported details of what it claimed was a draft agreement.

U.S. President Donald Trump on Wednesday appeared to threaten to attack U.S. ally Oman if it sides with Iran over reopening the Strait of Hormuz.

Trump said Oman must "behave" or he would "blow them up," when he was asked if he would accept a short-term deal to allow Iran and the Gulf state to control the waterway.

The United States struck southern Iran on Thursday, drawing retaliation from Tehran against a U.S. military base, in the most serious clashes since an April ceasefire began.

Iran condemned on Thursday what it called violations by the United States after its strikes on the southern port city of Bandar Abbas, while vowing to defend its sovereignty.

Iran's Revolutionary Guards on Wednesday said a return to war with the United States was unlikely, while warning that the Islamic republic stood ready against any attack.