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 Bahraini Ministry of Interior (MOI) announced on Sunday that three people were injured and material damage was caused to a university building in the Muharraq area, northeast of Bahrain, as a result of missile fragments falling.
At least four people were killed when an Israeli strike hit an apartment in the Ramada hotel building in central Beirut early on Sunday, with Israel saying it targeted Iranian commanders operating in the Lebanese capital.
Israel has warned Lebanon of a "very heavy price" if it did not rein in Hezbollah on Saturday, as it pounded the group's strongholds around the country with air strikes and mounted a deadly airborne raid in the east.
Dubai authorities have confirmed that debris from an aerial interception fell onto a vehicle in the Al Barsha area, resulting in the death of a driver.
President His Highness Sheikh Mohamed bin Zayed Al Nahyan said the UAE will "emerge stronger than before", affirming that the safety and security of citizens, residents, and visitors remain a top priority.