U.K.'s capture of Iranian oil tanker won't be 'unanswered' - military official

Britain's seizure of an Iranian oil tanker off Gibraltar last week will not be "unanswered", Iran's armed forces chief of staff, Major General Mohammad Bagheri, said on Tuesday, according to the semi-official Tasnim news agency.

"Capture of the Iranian oil tanker based on fabricated excuses ... will not be unanswered and when necessary Tehran will give an appropriate answer," Bagheri said. British Royal Marines boarded the ship, Grace 1, off the coast of Gibraltar on Thursday and seized it over accusations it was breaking sanctions by taking oil to Syria.