This was the moment Union Square subway station in New York City was engulfed in smoke and subsequently evacuated after debris on the track cause a fire.<br /><br />In footage captured yesterday (April 9) commuters on the 4 Train were evacuated out of the station.<br /><br />The fire was caused by debris on the tracks according to an NYC Transit spokesperson.<br /><br />The filmer explained to Newsflare: "I was on my way to work on the 4 train this morning, while stopped at the Union Square station we heard an explosion. <br /><br />"People got out of the train car to investigate when someone shouted to evacuate the station. <br /><br />"Police and firefighters came down as us passengers started to make our way out of the smoke; some more panicked than others. <br /><br />"I walked from the 4 line to the R line to continue my way to work"<br /><br />A spokesperson for the NYPD confirmed there was "sound of an explosion".
