<span style="color: #222222;">Several passengers were fell ill on Thursday after smoke was detected inside an air-conditioned coach of the Kolkata Metro.</span><br />'' <br />'' <span style="color: #222222;">The officials said, smoke was seen coming out of the Dum Dum-bound metro rake soon after the train left the Maidan station.</span><br />'' <br />'' <span style="color: #222222;">Metro Railway CPRO Indrani Banerjee said, the power connection was switched off and fire has been doused. </span><br />'' <br />'' <span style="color: #222222;">The official said, all the passengers have been evacuated and there has been no casualty. </span><br />'' <br />'' <span style="color: #222222;">Metro service was temporarily suspended after the incident.</span><br />''