ANKARA, Turkey—A strong earthquake shook western Turkey on Monday, causing at least three buildings that were damaged in a previous tremor to collapse, officials said. There were no immediate reports of casualties.
The magnitude 6.1 quake was centered in the town of Sindirgi in Balikesir province, according to the Disaster and Emergency Management agency, AFAD. It struck at 22:48 local time (1948 GMT) at a depth of 5.99 kilometers (3.72 miles.)





