Two railway workers killed on the tracks today could not hear the train approaching as they were wearing ear defenders, it has emerged.
from Swansea to Cardiff today.
Welsh Ambulance Service dashed to the scene near Port Talbot but were unable to save the men.
Now British Transport Police says the employees were using ear defenders.
"The initial stages of the investigation suggest that the two men who died had been wearing ear defenders at the time and tragically they could not hear the passenger train approaching," said Superintendent Andy Morgan from the force.
A third person was treated for shock at the scene.
British Transport Police is now assisting all the families.
"Following a number of urgent enquiries into this tragic incident, it has been established that the three people were railway workers who were working on the lines at the time.
"We have a number of officers who remain in the area and we are continuing to work alongside the Rail Accident Investigation Branch to understand the full circumstances of what happened in the moments before this incredibly sad, fatal collision.
"The two men’s families have been both informed and we will be providing them with as much help and support as possible through this undoubtedly difficult and distressing time.
"Likewise, we will make sure those who witnessed this traumatic incident, both at the scene and on board the striking train, receive the necessary support they require.
"I would also like to thank those on board the train for their patience and understanding while our officers and colleagues from Wales Ambulance Service responded to the incident today, as well as those effected by the ongoing disruption across the area."
The National Union of Rail, Maritime and Transport Workers (RMT) has called for all "similar works" to be suspended while the crash is investigated.
RMT General Secretary Mick Cash said: "This is shocking news.
"RMT is attempting to establish the full facts but our immediate reaction is that this is an appalling tragedy and that no one working on the railway should be placed in the situation that has resulted in the deaths that have been reported this morning.
"As well as demanding answers from Network Rail, and a suspension of all similar works until the facts are established, the union will be supporting, our members and their families at this time.
"Our thoughts are with those involved in this incident and their loved ones."
