Meanwhile the US says its Navy has successfully escorted an oil tanker through the Strait of Hormuz, a shipping route crucial to global energy supplies.
The reports of attacks on commercial ships came after the US said it "eliminated" 16 Iranian mine-layers in the area.
The reports of attacks on commercial ships came after the US said it "eliminated" 16 Iranian mine-layers in the area.
The US says the ships were targeted in the Strait of Hormuz - a key shipping route. Meanwhile, at least two attacks have been reported on commercial ships in the area.
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