NEW : At least 315 people were injured in the train collision , state media reports . As the days pass , the trains get older , '' said Maria Lujan Rey , whose son died in the 2012 crash . NEW : Passenger : `` The only thing you could here were screams '' NEW : Argentine president : `` I feel anger and impotence '' NEW :
NEW : At least 315 people were injured in the train collision , state media reports . NEW : Passenger : `` The only thing you could here were screams '' NEW : Argentine president : `` I feel anger and impotence '' NEW :