The Polish attorney general's office charged a train driver over Friday's derailment in Central Poland which left one person dead and more than 80 injured, Polish media said.
Four carriages of a passenger train bound from Warsaw to Katowice went off the tracks in the village of Baby, near the city of Piotrkow Trybunalski in central Poland at 4 p.m. local time.
The attorney general's office requested a three-month arrest for the 42-year-old train driver, saying that his actions caused the tragedy. The driver pleaded not guilty and faces a prison sentence of two to 12 years if convicted.
The TVN 24 channel said on Saturday the train exceeded the speed limit as travelled at a speed of 118 kmph at a railway section, which had been under repair for a month and where the speed limit was 40 kmph.