Kharg Island: Why has it been targeted by the US?

The tiny island is home to one of the most critical pieces of Iran's energy infrastructure.

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The US president said Kharg Island's military facilities were "totally obliterated" but that it had held off targeting its oil infrastructure.

Trump, however, warned that he would reconsider the decision not to target oil facilities on the island should Iran or others "do anything to interfere" with the safe passage of ships through the Strait of Hormuz - one of the world's most important shipping channels, located south of Iran's coast.

Iran's military said oil and energy infrastructure belonging to firms working with the US would "immediately be destroyed" should Kharg's oil infrastructure be attacked.

Kharg Island is a small rocky outcrop just 15 nautical miles (24km) off the coast of Iran.