A US Navy ship and three British Royal Navy boats were forced to change course when several Iranian fast-attack vessels approached them in the Strait of Hormuz on Saturday, a US official said on Monday.
Last Thursday, an Iranian naval frigate came within a hundred and fifty yards of the American ship in the Gulf of Oman, just south of the strategic Strait of Hormuz. The Invincible and three ships from the British Royal Navy accompanying it had to change course to avoid any collision, Pentagon spokesman Navy Capt. Jeff Davis said. USA officials labeled that encounter "unprofessional". The prefix "USNS" means the ship belongs to the U.S. Navy but is unarmed or only lightly armed.
In this December 29, 2016 file, released by the semi-official Iranian Students News Agency, a long-range S-200 missile is fired in a military drill in the Iranian port city of Bushehr, on the northern coast of Persian Gulf.
"The administration has already begun to push back in the way that we should, and I look forward to working with them as we prepare to introduce bipartisan legislation to deter Iran's threatening behavior on all fronts".
Tensions between the USA and Iran have increased since the election of Donald Trump, whose administration put Iran "on notice" over its recent ballistic missile tests.
A Navy official condemned the Iranian actions as "unsafe and unprofessional".
Iran has previously threatened to close off the strait in the past over tensions with the United States, a move that would lead to turmoil in global oil markets.
While still a presidential candidate in September, Donald Trump vowed that any Iranian vessels that harassed the U.S. Navy in the Gulf would be "shot out of the water".