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.

Tehran threatens US businesses, Hegseth says next few days 'decisive'
China, Pakistan call for Iran peace talks, normal navigation in Strait of Hormuz
Two injured after fallen drone debris hits houses in Saudi Arabia
Bangladesh considers partial online classes amid energy crisis
Two killed in fire at Russian petrochemicals plant
Three UN peacekeepers killed in Lebanon as Israeli strikes pummel south
Russian attacks kill two, injure dozens
