The casualties from an earthquake in Turkey’s Aegean region surged to 51 on Sunday, Turkish Vice President Fuat Oktay told.

The country’s Disaster and Emergency Management Authority said on Sunday, there have been 850 aftershocks with 40 stronger than magnitude-4.0.

Search and rescue activities continue in the Aegean province of Izmir.

At least 896 people were wounded Friday when a magnitude-6.6 quake jolted Izmir. A total of 104 people were rescued from under the rubble.

According to rescue officials, 20 buildings were destroyed in Izmir’s Bayrakli district which was in the process of urban transformation due to lack of earthquake resistance.

Among the hospitalized earthquake victims, 76% have been discharged as of Sunday morning, while eight people are in intensive care units.

President Tayyip Erdogan said 885 people had been injured, 15 of them critically.

Turkey is crossed by fault lines and is prone to earthquakes. In 1999, two powerful quakes killed 18,000 people in northwestern Turkey.