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Iran live updates: Tehran plans new 'restricted zone' outside Strait of Hormuz
A senior Iranian official said ships violating the new zone would be sanctioned.
President Donald Trump announced "major combat operations" against Iran on Feb. 28, with massive joint U.S.-Israeli strikes targeting military, government and infrastructure sites.
Delegations from the U.S. and Iran entered negotiations in June aimed at a war-ending deal based on a memorandum of understanding signed by both countries.
The U.S. and Iran have nonetheless continued to exchange strikes, with the strategic Strait of Hormuz as the primary flashpoint. Trump said in August that the U.S. would launch a "crushing economic operation" to force Tehran into submission.
Key Headlines
No more 'proportionate responses,' chief Iranian negotiator says
Mohammad Bagher Ghalibaf, Iran's chief negotiator and the speaker of the country's parliament, said in a speech posted to Telegram on Sunday that "the era of 'proportionate responses' is over."
The recent Iranian strikes targeting U.S. bases in the Middle East were "only the beginning," Ghalibaf said.
"The rules of the game have changed, and from now on, any transgression against the interests and security of Iran will receive a 'faster, heavier, and more painful' response," Ghalibaf said.
-ABC News' Rashid Haddou
Iran navy says they attacked 3 oil tankers, US-linked vessels
Iran's IRGC navy said in a statement on Saturday that they have targeted three oil tankers which have been sailing through "an unauthorized route" in the Strait of Hormuz, as well as three vessels affiliated with the United States in other areas.
The IRGC navy warned all vessels in the Persian Gulf and near the Strait of Hormuz "not to be deceived" by the U.S. military and refrain from "any suspicious movement" to pass through unauthorized waterways or they would be targeted.
The U.S. has not immediately commented about the claims.
-ABC News' Somayeh Malekian