Iranian gunboats approached U.S.-flagged tanker in Strait of Hormuz

Feb 3 (Reuters) - Three pairs of Iranian gunboats approached a U.S.-flagged tanker in the Strait of Hormuz north of Oman, maritime sources and a security consultancy said on Tuesday.

The tanker, the Stena Imperative, "did not enter Iranian internal territorial waters" and was escorted by a U.S. warship, maritime risk management group Vanguard said.