Photo taken on Nov. 26, 2018 shows the site of the train collision in Sivas, Turkey. At least 15 people were injured when a passenger train collided with a freight train in Turkey's central province of Sivas on Monday. (Xinhua)

Photo taken on Nov. 26, 2018 shows the site of the train collision in Sivas, Turkey. At least 15 people were injured when a passenger train collided with a freight train in Turkey's central province of Sivas on Monday. (Xinhua)

Photo taken on Nov. 26, 2018 shows the site of the train collision in Sivas, Turkey. At least 15 people were injured when a passenger train collided with a freight train in Turkey's central province of Sivas on Monday. (Xinhua)