Iran's Islamic Revolutionary Guard Corps has warned that any nation, "including Britain or Persian Gulf states, offering support to the United States in the conflict would be considered a legitimate target", IRNA reported.

An IRGC spokesperson said that  "Israeli return to hostilities would be met with a devastating response".

The warning came after Tehran summoned Ukrainian diplomats after Kyiv bombed an Iranian ship in the Caspian Sea, killing at least one soldier and injuring another.