At least two merchant vessels said they were hit by gunfire as they attempted to cross the Strait of Hormuz on Saturday, three maritime security and shipping sources said.
The impact was not immediately clear.
Reporting by Yannis Souliotis in Athens and Marwa Rashad in London Reuters
Iran said it was tightening control over the Strait of Hormuz on Saturday, warning mariners that the energy lifeline was again closed, as shipping sources said at least two vessels reported coming under fire while trying to transit the waterway.
Tehran said it was responding to a continued U.S. blockade of Iranian ports, calling it a violation of their ceasefire, while Supreme Leader Mojtaba Khamenei said Iran's navy was ready to inflict "new bitter defeats" on its enemies.
