A 6.1 magnitude earthquake struck northwestern Turkey in the early hours of Wednesday morning, injuring at least 22 people, according to health chiefs.

According to the US Geological Survey, the shallow quake struck about 170 kilometers east of Istanbul, the country’s largest city.

Interior Minister Suleyman Soylu said on Twitter that there was no information about the loss of life.

Health Minister Fahrettin Koca tweeted that 22 people were injured – including one who was seriously injured after jumping from a building in panic.

Turkish authorities said the quake’s epicenter was in the Golyaka district of Duzce province, although it was also strongly felt in Istanbul.

The first pictures showed people wrapped in blankets in front of their houses in the early morning.

Turkey’s disaster agency AFAD said there were controlled power outages in the Duzce region and warned residents not to panic.

Turkey is located in one of the most active seismic zones in the world.

A magnitude 6.8 quake struck Elazig in January 2020, killing more than 40 people.

In November of the same year, a powerful 7.0 magnitude tremor shook the Aegean Sea, killing 114 people and injuring more than 1,000.