A magnitude-6.1 earthquake struck northwest Turkey during Wednesday's early hours, injuring at least 35 people.
The shallow tremor struck about 170 kilometers east of Istanbul, the country's largest city, where it was strongly felt.
National authorities said the quake was at a magnitude of 5.9 -- lower than the 6.1 given by the US Geological Survey -- and its epicenter was in Duzce province's Golyaka district, though it also shook other nearby cities.
"We were woken up with a big noise and tremor," Duzce resident Fatma Colak told AFP.
"We got out of our homes in panic and now we are waiting outside."
Health Minister Fahrettin Koca tweeted that 35 people were injured including 32 in Duzce, one in Istanbul and the other two in the nearby provinces of Bolu and Zonguldak.
Interior Minister Suleyman Soylu, who visited Golyaka, said one person was seriously hurt after jumping from a balcony out of panic.
He said 70 aftershocks had been recorded.
"We almost completed our checks in the villages around Golyaka. There is no severe damage reported; only some barns
were wrecked in these places ... There was a power cut during the quake but authorities are reinstating power now," Soylu said on broadcaster TRT Haber.
Initial images showed people covered in blankets outside their homes during the early morning. Some were seen placing blankets on the floor outside, and lighting fires for warmth.
Authorities said schools would be closed on Wednesday in Duzce and Sakarya provinces.
Soylu said that, apart from a few ruined barns, there were no reports of heavy damage or building collapses, but inspections were continuing.
National disaster agency the AFAD said there were controlled blackouts in the Duzce region, urging residents not to panic.
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