CATCH ME UP
Iran said it struck an unmanned U.S. vessel that was trying to enter the Strait of Hormuz.
The U.S. military had previously said it struck three Iranian oil tankers.
Separate Israeli strikes in southern Lebanon reportedly killed four people.
The strikes followed drone attacks by Hezbollah.
Why it mattersThe clashes could widen regional instability, raise shipping risk in Hormuz, and pull more actors into the conflict.
More context
The report also says regional diplomatic efforts and domestic security actions in Iran are part of the wider situation.