I hadn't heard about this. Can you post some details? I know this happened a while back somewhere in Europe. The flange of the wheel separated from the rest of the wheel and was driven up through the floor of the train. It eventually caused the train to derail going over 100mph if I remember correctly.
"Please do not attempt to board the train until it has arrived in the station. Thank you."
"Use Track 5 for the 5:17 local train to Raritan which has just departed."