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.
Hamas officials have arrived in Egypt on Sunday ahead of talks with Israel planned for Monday that the US hopes will lead to a halt in fighting and the freeing of hostages in Gaza, with Washington's top diplomat saying the next days are critical.
US forces hit another vessel allegedly carrying illegal drugs off the coast of Venezuela on Saturday evening, President Donald Trump said on Sunday, adding that they would also start looking at drug trafficking occurring on land.
The death toll from the collapse of an Islamic boarding school in Indonesia last week jumped to at least 49 people as rescuers have cleared nearly all of the debris, the country's disaster mitigation agency said in a statement handed out on Monday.
GCC Secretary-General Jasem Mohamed Al-Budaiwi has welcomed the steps taken by Hamas in response to US President Donald Trump's Gaza proposal while stressing on the importance of strengthening Gulf integration to confront accelerating global changes.
Israeli planes and tanks pounded areas across the Gaza Strip overnight and on Sunday, destroying several residential buildings, witnesses said, as Palestinians desperately awaited implementation of a US plan to end the war.