Iran said Saturday that it was up to the United States whether to pursue a negotiated settlement or to return to open war, but that Tehran was ready for either outcome.

A senior Iranian military officer said on Saturday that renewed fighting between the U.S. and Iran was "likely", hours after President Donald Trump said he was "not satisfied" with a new Iranian negotiating proposal.

U.S. President Donald Trump said on Friday the U.S. Navy was acting "like pirates" as he described an operation seizing a ship amid the tit-for-tat American blockade of Iranian ports.

"We... land on top of it and we took over the ship. We took over the cargo, took over the oil. It's a very profitable business," Trump said at a rally in Florida.

U.S. President Donald Trump said Friday that he was "not satisfied" with a new Iranian negotiating proposal, with peace talks between the two sides frozen despite a weeks-long ceasefire.

Iran has delivered a new proposal for talks with the United States via mediator Pakistan, state media reported on Friday.

The United Arab Emirates foreign ministry has announced a travel ban on Emirati nationals going to Iran, Lebanon and Iraq, citing regional developments including the Middle East war.

Iraqi Prime Minister-designate Ali al-Zaidi received a call from U.S. President Donald Trump, who congratulated him on his nomination and invited him to the U.S. once his government is formed, his office announced Thursday.

Tehran's air defenses were activated to counter small aircraft and drones late Thursday, as the White House signalled that it will not be reined in by a congressional deadline on the Iran war.

Israel's defense minister on Thursday said Israel may soon have to "act again" against Iran, to ensure the Islamic republic "does not once again become a threat to Israel."

Iran's President Masoud Pezeshkian on Thursday said a U.S. naval blockade of Iranian ports would deepen disruptions in the Gulf and fail to achieve its objectives.