Kolkata Metro blue line faces morning disruption again, services hit for 40 minutes olkata Metro services on the blue line were disrupted early Thursday morning due to a technical fault, causing inconvenience to thousands of commuters at the start of the day. Uninterrupted services were unavailable between 7.35 am and 8.17 am, affecting peak-hour travel for students and office-goers. Metro operations during the disruption were restricted to partial stretches, running only between Dakshineswar an