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.
The father and stepmother of Sara Sharif, a 10-year-old girl who was found dead in her home in Britain, were on Wednesday convicted of her murder after a trial which heard harrowing details of her treatment before her death.
The Afghan Taliban's acting minister for refugees, Khalil Rahman Haqqani, and six other people were killed in an explosion in the capital Kabul on Wednesday, his nephew said.
Israeli strikes in the northern and central Gaza Strip on Wednesday killed at least 33 Palestinians, most of them in Beit Lahiya town in the north of the enclave, medics said.
Syrian rebels backed by Turkey, who ousted president Bashar al-Assad, said on Tuesday they had taken the eastern city of Deir ez-Zur, while a war monitor confirmed Kurdish forces had withdrawn.
The death toll from a Russian missile strike that destroyed a clinic in the Ukrainian city of Zaporizhzhia on Tuesday has risen to six, while four more people remain under the rubble, the regional governor and emergency services said on Wednesday.