Iran's Revolutionary Guards (IRG) are "highly likely" to have had a role in sabotaging four tankers off Fujairah in the United Arab Emirates last Sunday, according to Reuters reports.

The hulls of tankers owned by interests in Saudi Arabia, UAE and Norway were damaged by explosives in the attack this week.

A confidential report from the Norwegian Shipowners' Mutual War Risks Insurance Association (DNK), seen by Reuters, says the attack is likely to have been carried out by underwater drones.

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