Rubio urges world to stop Iran starting 'tolling' in key strait

US Secretary of State Marco Rubio said he had made progress with allies in opposing Iranian threats to start "tolling" vessels that pass through the strategic Strait of Hormuz.

"Not only is this illegal, it's unacceptable, it's dangerous to the world, and it's important that the world have a plan to confront it," Mr Rubio told reporters in Paris after a G7 meeting, where he said he found "a lot of buy-in" to opposing the Iranian plan.

He also said he expected Washington's war objectives in Iran to be completed in the next two weeks, regardless of whether the United States sends ground troops.

"When we are done with them here in the next couple weeks, they will be weaker than they've been in recent history," Mr Rubio said.