Iran seeks to tighten control over strait of Hormuz alongside Khamenei funeral

IRGC warnings force ships to turn back as Tehran uses passages from Qur'an to send messages to Gulf delegations

The diplomatic and military contest for control of the strait of Hormuz has intensified alongside the dramatic scenes of mourning for the death of Iran's supreme leader Ali Khamenei, with some claiming Khamenei's legacy ultimately depends on Tehran's grip on the waterway, and so the global economy.

Over the past 48 hours, as crowds have swirled in Tehran, the Islamic Revolutionary Guard Corps appeared to have started to plug a gaping and growing gap in their monopoly control of the strait.