Like many Iranians, Maryam Sofi says the West and Iran are locked in a dangerous game. "I don't think we can know just yet if war will break out, but I am concerned for my family and my country," says university teacher Sofi, 42, a mother of two.

"I cannot sleep at night, thinking about destruction and bloodshed if Israel and America attack Iran."

The United States and Israel have not ruled out military action against Iran's nuclear facilities if diplomacy fails to resolve a dispute over a program they suspect is aimed at developing atomic weapons.

In Washington on Thursday, U.S. President Barack Obama said the United States was considering all options on Iran and would work with allies to prevent Tehran from acquiring a nuclear weapon.