Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. British Seizure of Iranian Tanker Draws Tehran's Wrath Jamie Dettmer The impounding off the coast of Gibraltar of a supertanker suspected of smuggling two million barrels of Iranian oil is adding to spiraling tensions between Washington and Tehran. Iranian officials say the seizure this week by British royal Marines, of a ship that appeared to be heading for Syria, was at the behest of the U.S. The impounding of the supertanker was quickly welcomed by White House national security adviser John Bolton. "Excellent news: UK has detained the supertanker Grace I laden with Iranian oil bound for Syria in violation of EU sanctions," Bolton tweeted. Excellent news: UK has detained the supertanker Grace I laden with Iranian oil bound for Syria in violation of EU sanctions. America & our allies will continue to prevent regimes in Tehran & Damascus from profiting off this illicit trade. -- John Bolton (@AmbJohnBolton) [1]July 4, 2019 Western diplomats are braced for Iranian reprisals, most likely in the Strait of Hormuz. Iran has already been accused by Washington of sabotaging half-a-dozen oil tankers in the strait in a policy of brinkmanship aimed at underlining to European countries the costs of siding with Washington in a confrontation triggered by U.S. President Donald Trump's decision last year to abandon the 2015 nuclear deal and reimpose economic sanctions. Iran has denied it has mounted any mining operations against shipping in the Strait of Hormuz. A detachment of 30 British Royal Marines working with Gibraltar's police intercepted Grace 1 overnight Wednesday as it headed east off the British peninsula. Some marines landed on the deck by dropping from ropes suspended below a hovering Wildcat helicopter. Others boarded from speedboats, pulled up alongside. References 1. https://twitter.com/AmbJohnBolton/status/1146877026751647756?ref_src=twsrc%5Etfw .