Iran is seeing its biggest protests in three years after the currency plunged to a record low against the dollar. The Central Bank governor resigned on Monday.

Unrest is triggered by a drop in Iran’s currency, as frustration with a persistent economic crisis rises.

Images show roads in Tehran filled with protesters shoulder to shoulder Monday, disrupting traffic and clogging roadways.

The currency’s slide has accelerated as oil revenues have shrunk under sanctions from the US, which briefly joined the war to bomb Iran’s nuclear sites. The country’s stubbornly high inflation rate rose to 42.2 per cent in December year on year.

Iran seized a foreign oil tanker as it traveled the strategic Strait of Hormuz carrying some 25,000 barrels of smuggled fuel, state media said.

As Netanyahu meets Trump, intelligence suggests Iran accelerating chemical weapons work while facing unprecedented domestic unrest and economic crisis.

Russia's space agency Roscosmos launched the Iranian satellites alongside two Russian Aist-2T Earth observation satelites and dozens of cubesats aboard a Soyuz 2.1b rocket on a mission that lifted off from the country's Vostochny Cosmodrome in Siberia. Fifty-two satellites were launched in all.

The Iran Human Rights (IHR) group says it has verified at least 1,500 executions up until the start of December.