Travellers to Iran from Europe will be required to self-quarantine for two weeks after testing negative upon arrival, a health official said on Saturday.
Travellers from other regions, including neighbouring countries, will have to have tested negative before arrival in the country, Alireza Raisi, spokesman for the national coronavirus task force, said on state TV.
Raisi said travellers arriving from Europe should be holding negative test results, will be tested again and will have to self-quarantine even if their test is negative, state media reported.
Previously, people coming from Europe were only required to test negative.
He did not say when exactly the new measures will go into effect, saying only "from now on."
Meanwhile, health officials said the Iranian-manufactured Barekat vaccine was found effective against the highly contagious coronavirus variant that emerged in Britain.
President Donald Trump said the US was considering "winding down" its military operation against Iran, as Iran and Israel traded attacks on Saturday and Iranian media said the nuclear enrichment facility in Natanz had been attacked.
Robert Mueller, the no-nonsense former FBI chief who documented Russia's interference in the 2016 US election and its contacts with Donald Trump's campaign but opted not to bring criminal charges against a sitting president, has died at age 81.
Fourteen people died and 25 were seriously injured in a fire at a car parts factory in the South Korean city of Daejeon, fire authorities said on Saturday.
Russian attacks on Ukraine killed two people in Zaporizhzhia and left most of the northern region of Chernihiv without power on Saturday, Ukrainian officials said.