Polish emergency services work at the site of a train crash near the town of Szczekociny March 4, 2012. At least 16 people were killed when two passenger trains collided head-on in southern Poland late on Saturday in one of the country's worst train crashes in more than 20 years. The two trains carrying an estimated 350 passengers were heading in opposite directions on the same track when they crashed at high speed in a rural area near the town of Szczekociny. At least 54 people were injured. [Photo/Agencies]

Picture shows the site of trains' crash near the town of Szczechociny March 4, 2012. [Photo/Agencies]