my theory is that the second guy might have tripped on something and lost his balance while his buddy behind him tried to help him and too lost his balance.
As you can see from the various photos, the path is only 0.5m wide [barely the width of the human body] and dangerously close to the train. [you hv to consider that the width of the train is much wider than that of the rails shown in the pics.
once you lost your balance and with the train travelling at high speed, you could easily got "sucked" in.
It seems that it has become a trend of passing the blame to the dead.
There is obviously a systemic flaw in the safety planning. All drivers should be alerted of any maintenance work being carried out and should be informed to approach the respective sector with caution.!! (The driver was reported to be shocked to see maintenance staff there)
The blame should not be only on those on the track for not taking the initiative.!