The development comes after the killing of a number of members of the Revolutionary Guard.
General Hossein Salami says Tehran will avenge the death of General Qasem Soleimani, who was killed in a US drone strike earlier this year.
"We will respond decisively to any sabotage," Head of Iran's Revolutionary Guards Major General Hossein Salami warns, while oil prices soar amid Iran-US saber-rattling.
“Today, the American soldier is in danger, tomorrow the European soldier could be in danger,” Iranian President Hassan Rouhani said as three nations challenged Tehran over breaking the limits of its nuclear deal.
US President Donald Trump's has tightened economic sanctions against Iran and his administration says it has built up the US military presence in the region. Tehran has described the US moves as "psychological warfare" and a "political game."
Part VI: The Power of the Revolutionary Guard - this is the sixth in a series of articles that looks at how the Iranian Revolution came to be in 1979, and where it has led Iran over the course of four decades.
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