Heavy snowfall and plummeting temperatures shut schools and shops in the Greek capital on Monday, with many public services and businesses switching to remote working.
Traffic was halted on some central roads and on a national road connecting Athens to central Greece, as storm Barbara swept across the country, blanketing the capital.
Some metro stations close to the city's international airport were also shut and train routes to the northern city of Thessaloniki were suspended.
Authorities urged the public to avoid non-essential travel.
Fire brigade rescue crews had evacuated four people whose car was stuck in the snow in the Athens suburb of Aspropyrgos, according to state TV ERT.
The cold snap was expected to last until Tuesday, gradually affecting eastern and southern regions, including the island of Crete.
Heavy snow is rare in the Greek capital but the country has now been hit by extreme weather for a third consecutive winter. Until Monday's snow, winter in Greece has been unusually mild so far this year.
A Saudi AH-6i helicopter has crashed in Saudi Arabia's Najran region due to a technical malfunction, killing its two crew members, according to Yemen's Saudi-led coalition on Sunday.
At least 17 people have been killed and several others injured in a stampede at a religious festival in north Kolkata in India, local media reported on Saturday.
France has woken on Sunday to the wreckage of one of its most violent days of unrest in years after protests over high prices and public services left one demonstrator dead, hundreds of police injured and nearly 1,800 people arrested.
A truck has driven into a youth soccer game in Wichita, Kansas, leaving a six-year-old boy and a 35-year-old man dead and 10 others hospitalised with traumatic injuries, police said on Saturday.
Pope Leo has pledged on Sunday to slowly resume his usual activities as the leader of the world's 1.4 billion Catholics as he greeted crowds in St. Peter's Square during his first public event since undergoing surgery for lung cancer five days ago.
One person was killed and 15 were injured in a Ukrainian drone attack on oil facilities, logistics and data centres in Russia's St Petersburg and the Leningrad region, local authorities said on Sunday.
Demonstrations began across France on Saturday in what was expected to become a major nationwide protest against high prices and the fraying of a model intended to provide a basic level of opportunity and social security.
Egyptian President Abdel Fattah al-Sisi said on Saturday that his presidential term would end in 2030 and that the question of his departure from office was settled, reaffirming that Egypt's constitution would not be amended.
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