A strong quake has hit near the Greek capital, Athens, causing people to run out into the streets and problems in telecommunications.
The 5.1 magnitude tremor struck 23 kilometers (14 miles) northwest of the capital, near Magoula, according to the Athens Institute of Geodynamics.
The shock was caught live in the studios of state broadcaster ERT.
Government spokesman Stelios Petsas said authorities had received reports that two old houses collapsed in Drapetsona and Petralona, while several buildings in Egaleo and Monastiraki suffered minor damages on their facades.
"It was a very intense quake, we were terrified, everyone started coming out (of the building)", said Katerina, who works in a six-storey cosmetics store. Two helicopters were also assessing the extent of damage.
Anxious residents and office staff quickly gathered in outdoor areas, and department stores asked shoppers to leave but the government denied it had ordered an evacuation alert.
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People in Athens felt the quake as it hit, causing some to run into the streets, per the Associated Press.
The U.S. Geological Survey reported a magnitude of 5.3.
Efthymios Lekkas, head of the state anti-quake protection agency, said there was no reason for alarm.
The epicentre was reported as being 23km northwest of Athens.
"For the time being we can not be sure whether this was the main quake", seismologist Gerassimos Papadopoulos told ERT.
"It had a very shallow depth and that's why it was felt so strongly", he said, adding that the natural disaster had been followed by a normal pattern of aftershocks. "It is too early to say whether this was the main quake, but there have been aftershocks of magnitude 3.5, 2.5 and 3.2, and that is encouraging".