Iran has seized a British-flagged oil tanker in the Strait of Hormuz, it said via state TV on Friday. The U.K.'s Stena Impero was heading to Saudi Arabia in international waters when it "was approached by unidentified small crafts and a helicopter," the ship's owner said. They soon lost contact with the 23 people onboard and the Stena Impero started heading northward toward Iran. No injuries have been reported. Iranian state TV reported that the country's Revolutionary Guard seized the ship for "violating international regulations." Soon after, Iran reportedly seized a Liberian-flagged tanker as well, but that ship has since been allowed to continue its course. Iran said the seizure was a 'reciprocal' move after a British court decided to continue detaining an Iranian oil tanker that allegedly breached European sanctions on Syria. The U.K. vowed "robust" action if Iran does not release the ship.

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