The powerful earthquake that hit Turkey has killed at least 39 people and injured more than 800 others.

Three young children and their mother were rescued alive from the rubble of a collapsed building in western Turkey on Saturday, some 23 hours after the earthquake.

One of the children died soon after being rescued, while a fourth child was still trapped.

IFrame The Friday afternoon quake that struck Turkey’s Aegean coast and north of the Greek island of Samos registered a magnitude that Turkish authorities put at 6.6 while other seismology institutes said it measured 6.9. It toppled buildings in Izmir, Turkey’s third-largest city, and triggered a small tsunami in the Seferihisar district and on the Greek island. Hundreds of aftershocks followed.

At least 36 people were killed in Izmir, Turkey’s Disaster and Emergency Management Presidency, or AFAD, said. Among them was an elderly woman who drowned in the tsunami. But rescue teams on Saturday made contact with 38-year old Seher Perincek and her four children – ages 3, 7 and 10-year-old twins – inside a fallen building in Izmir and cleared a corridor to bring them out.