The second scenario would suggest Tehran was underlining its vocal opposition to Mr Bush’s Mid-East visit. His rare trip to the region is aimed at bolstering Arab support against Iran’s nuclear programme as well as shoring up troubled peace moves between the Israelis and Palestinians.
The narrow Strait of Hormuz at the mouth of the Persian Gulf is one of the world’s most sensitive strategic locations, with at least a fifth of the world’s crude oil supply passing through it.