Two trains have collided in southern Poland, leaving 15 people dead and 50 hurt, local officials say. The accident occurred on Saturday evening on the Warsaw-Krakow mainline at the small town of Szczekociny, according to Polish TV. Two express trains, one of which was on the wrong track, collided head-on, a senior railway official said. Prime Minister Donald Tusk called the accident Poland’s “most tragic train catastrophe… in many years.” Tusk arrived at the scene early on Sunday morning, with three other cabinet ministers. The two trains, comprising 10 carriages in total, were carrying an estimated 350 passengers at the time of the crash. Helicopter ambulances from Warsaw and Wroclaw helped to take the injured to hospitals.