An Accident.

When I was waiting for the train after work, the train on the opposite side stopped before the platform. 
One conductor came out from the train and he ran on the railway tracks to another conductor in the last car. 
He seemed like he was upset. 
 There was an announcement that the train stopped due to an accident resulting in an injury or death and all trains would not  run for about 2 hours. 
There were many hecklers  onlookers, an ambulance and some police cars. 
According to one woman, one person got in an accident at the railway crossing near the station and she or he passed away. 
I was shocked. Please rest in peace.

******Hecklers is not the correct word. A heckler is someone looking on BUT they are complaining and shouting bad things. Maybe you mean onlookers (people quietly looking with curiosity?)

*******This situation is always sad.