An investigation has been launched to find out now only why a rail embankment in Northern Ireland failed but also why the involvement of a train in the incident went unreported for two months.
The Rail Accident Investigation Branch (RAIB) said that it was notified of the embankment failure that took place at Knockmore on 28 June on 4 July but the fact that a train ran over the unsupported tracks has only just emerged.
In a statement, RAIB said that a passenger train travelling from Belfast to Portrush ran over the failed embankment when the driver was unable to stop the train in time. The first of six coaches ran over the unsupported track before the driver was able to reverse the train away from the danger area.
It is believed that the embankment collapse was caused by a wash-out incident.
RAIB has now launched an investigation into the event and the delay in reporting the full details of the incident.