A massive 6.0 magnitude earthquake has left 50 people injured after hitting the north-west of Turkey and was felt in Istanbul and the capital Ankara.
Dramatic footage shows rooms shaking and debris from buildings with the quake striking in the middle of the night.
The quake was centred in the town of Golkaya, in Duzce province, around 120 miles east of Istanbul.
It was at a depth of six kilometres and struck shortly after 4 am local time with authorities saying that there have been 50 people injured and one is in a critical condition.
The quake sent people rushing out of buildings and led to power being cut in the area, Duzce's mayor Faruk Ozlu told private NTV television.
National authorities said the quake was at a magnitude of 5.9 but the US Geological Survey said it was 6.1.
Interior Minister Suleyman Soylu, who visited Golyaka, said one person was seriously hurt after jumping from a balcony out of panic.
Ozlu said there was no immediate report of casualty or damage but authorities were still assessing possible destruction.
National disaster agency AFAD said there were controlled blackouts in the Duzce region and it also reported that 101 aftershocks had been recorded.
People have told of being woken up in the night by the strong tremor and seeing their homes shake - some said it lasted for around 30 seconds.
Many have posted photos and videos of their homes with furniture flung around by the force of the quake.
A Twitter user posted a photo of his wardrobe smashed on the floor of his room with the comment: "I thought it would never end."
One person in Duzce wrote: "I was sleeping and woke up quickly."
While another 30 miles from epicentre said: "The shaking was so bad we were woken straight away."
Many others described similar scenes with one resident in Erenler saying that they now have no electricity.
Turkey sits on top of major fault lines and is frequently shaken by earthquakes.
Duzce was one of the regions hit by a 7.4-magnitude earthquake in 1999, which was the worst to hit Turkey in decades.
That quake killed more than 17,000 people, including about 1,000 in Istanbul.
In October 2020, a magnitude-7.0 quake hit the Aegean Sea, killing 114 people and wounding more than 1,000.
