A powerful earthquake which struck eastern Turkey has killed at least 21 people - with dozens more feared to be trapped beneath the rubble.
Worried residents in the area are waiting for news of missing loved ones as rescuers continue to search for survivors beneath the debris.
The magnitude 6.8 earthquake shook Elazig province, about 340 miles east of the capital Ankara, and a few hundred miles from major city and tourist hotspot Adana.
The tremor, which collapsed building in the town and was strong enough to be felt in several neighbouring countries,and was followed by more than 270 aftershocks, 12 of which had magnitudes over 4.
Seventeen people were killed in Elazig and four more in the neighbouring province of Malatya, said Turkey's Disaster and Emergency Authority (AFAD), adding 1,030 others were injured and in hospitals in the region. It said rescue efforts were underway at three different sites in Elazig.
Footage early on Saturday showed emergency workers rescuing three people in Elazig after 12 hours under the rubble.
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Another woman in Elazig was rescued after 13 hours, while authorities listened for voices, with the government saying 30 more people were still trapped.
State broadcaster TRT showed footage of dozens of workers in the dawn light using shovels to dig out a partly collapsed building in Elazig.
Windows were smashed and balconies from at least four storeys had crashed to the ground.
Teams worked through the night with their hands, drills and mechanical diggers to remove bricks and plaster from the ruins in the province where the overnight temperature dipped to -8 degrees Celsius.
"Our houses collapsed ... we cannot go inside them," said a 32-year-old man from the town of Sivrice, epicentre of the quake which struck shortly before 9 pm - around 6pm GMT.
"In our village some people lost their lives. I hope God will help us," said the man, who gave only his first name, Sinasi.
"Our animals died. Our families gathered around the fire to spend the night, covered with blankets," Sinasi said as he and a relative tried to warm themselves by a small fire.
State media in Syria and Iran both reported the earthquake was felt in those countries. Local media in Lebanon said the cities of Beirut and Tripoli also felt the quake.
Turkish Interior Minister Suleyman Soylu described it as a "Level 3" incident according to the country's emergency response plan, meaning it called for a national response but did not require international help.
He said Turkey, which straddles seismic faultlines and is prone to earthquakes, had learnt lessons from previous disasters which helped it address Friday's incident.
Drones were deployed in search operations and to communicate between provinces.
Emergency teams and rescue equipment were sent from other provinces to Elazig after the quake. Flag-carrier Turkish Airlines started additional flights to Elazig from Ankara and Istanbul to help transport rescuers.
AFAD warned residents not to return to damaged buildings because of the danger of further aftershocks. It said beds, blankets and tents were being sent to the area, where some people sheltered in sports gymnasiums.
Turkey's Kizilay aid group also sent food, heaters and other materials to the region.
"I wish God's mercy to our brothers who lost their lives in the earthquake, and urgent healing for those who were injured," President Tayyip Erdogan said on Twitter.
He said his Interior, Health, and Environment and Urbanisation ministers were in the region for inspections.
Turkey has a history of powerful earthquakes.
More than 17,000 people were killed in August 1999 when a 7.6 magnitude quake struck the western city of Limit, 90km (55 miles) southeast of Istanbul.
About 500,000 people were made homeless.
In 2011, an earthquake struck the eastern city of Van and the town of Ercis, some 100 km (60 miles) to the north, killing
at least 523 people.
