British Transport Police (BTP) is calling on parents and children to remember the dangers of straying onto railway tracks after two separate incidents in Derbyshire earlier this month.
Officers are investigating how debris was placed on the Leeds to Nottingham railway line on successive Mondays. In both cases, a number of drivers spotted children near the line.
During the early evening of Monday 2 June, the driver of the 6.05pm Leeds to Nottingham service saw two very young boys and a very young girl close to the track near the disused Bennerley Viaduct at Cotmanhay, near Ilkeston. Shortly afterwards, the train hit a large piece of ballast. Two other drivers reported ballast on the line that evening, and more children were seen on a nearby footbridge.