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Fresh US strikes triggered air defences in Tehran on Wednesday after President Donald Trump warned he was “not finished” with a war on Iran that has already cost his nation $37.5 billion.

After the foes’ fighting over the strategic Strait of Hormuz led to the collapse of a preliminary deal, the Middle East war has expanded to include the region’s other key chokepoint for global oil supplies.

The US military said its latest attacks hit targets such as “military logistics infrastructure” while Iranian state media reported strikes around the country, including Bushehr, which hosts a nuclear power plant.

“News sources reported minutes ago that air defence activity was heard in the west, east and northeast of Tehran,” state TV posted on Telegram.