An earthquake measuring 5.7 on the Richter scale struck Istanbul on Thursday.
Images on social media showed buildings evacuated in the Turkish city.
"My whole flat rocked like crazy," wrote a resident on Twitter.
According to the Kandilli Observatory and Earthquake Research Institute, the epicentre was about 70 km west of Istanbul in the Marmara Sea, south of the town of Silivri.

One dead, several injured in Iranian attack on Manama building
Trump says war could be over soon, as Iran rallies behind new leader
Iran names Mojtaba Khamenei as new supreme leader
Indonesia says 7 killed in landfill collapse as rescue operation ends
