Iran seized two oil tankers Thursday while former Iranian minister Ezzatollah Zarghami threatened to make the Strait of Hormuz a "massacre and hell" for U.S. forces.

A U.S.-flagged tanker heading for Bahrain was approached and threatened by Iranian gunboats in the Strait of Hormuz, a British maritime security firm says.

Iran recently warned that it will conduct a five-day drill in the Strait, which is used by several countries to ship oil. | World News

Feb 4 (Reuters) - The Strait of Hormuz, which is vital for oil exports, has come into renewed focus after an incident reported on Tuesday in which Iranian gunboats approached a U.S.-flagged tanker in the strategic waterway north of Oman. Also on Tuesday ...

The blast happened a day before a planned naval drill by Iran in the Strait of Hormuz, the narrow mouth of the Persian Gulf through which a fifth of all oil traded passes.

Tehran warns of live fire into crucial strait through which a fifth of all oil traded passes; US warns any unsafe actions risk regional 'destabilization'

Feb 10 (Reuters) - Oil prices eased slightly on Tuesday as traders gauged the potential for supply disruptions after U.S. guidance for vessels transiting the Strait of Hormuz kept attention squarely on tensions between Washington and Tehran.

The Strait of Hormuz is one of the most intensely monitored waterways on earth, yet beneath its shallow, noisy surface Iran has built a submarine threat that is deliberately hard to hear and even harder to track.