Russian commuters are evacuated from the Moscow metro after a fire - the second to break out in the underground transport network within a matter of hours.<br/> <br />Eighteen people in total were sent to hospital after both fires on Wednesday.<br/> <br />Firefighters rushed to the scene to evacuate passengers and douse the flames.<br/> <br />The blazes sparked in the same area, causing transport chaos and halting the metro's red line.<br/> <br />The first fire occurred during Moscow's morning rush hour - forcing over 4,000 people to be evacuated.<br/> <br />This man says the smoke in the tunnels was unbearable.<br/> <br />It is not yet known what caused the two fires or whether they were connected.