The US government's move to legally seize Iranian gasoline allegedly en route to Venezuela has raised more questions than it answers.

Last Thursday, the US secured a legal ruling in the District of Columbia federal court allowing it to claim the 1.16m barrels of gasoline aboard four Greek-linked tankers in its latest attempt to and topple the ruling regimes of Venezuela and Iran.

But what comes next is anyone's guess, as the US has to actually enforce the judge's decision.