UPDATE — this extends our earlier coverage: Iran Strikes Kuwait as Trump Threatens More Attacks, Weighs Exit

US aircraft struck Iranian rocket launchers on Larak island in the Strait of Hormuz on Sunday, opening a new front days after Iran fired rockets at Kuwait and Donald Trump threatened further strikes. Washington struck first this time, retaliating against what it says is a newly modified Iranian capability: rockets converted to fire naval mines into the strait, according to France 24.

The claim is unprecedented if confirmed, and several analysts remain sceptical it has happened, according to France 24. WTI crude rose after the strikes raised the odds of a disruption at Hormuz, per TradingPedia.

Sea mines don't have to sink a tanker to work: insurers and shipping lines treat the mere risk as reason to reroute or halt transits, according to TradingPedia.

What to watch: whether Tehran confirms or denies the mine-rocket capability, whether Washington expands strikes beyond Larak, and whether shipping insurers begin rerouting tankers away from Hormuz.