Kolkata: Passengers of Kolkata Metro had to face tremendous harassment twice on Thursday morning and afternoon. In the morning, Metro services were disrupted after a technical glitch caused sparks in the third rail. Later in the afternoon, Metro services were suspended due to maintenance work.According to sources, on Thursday morning at around 8:30 am, a Metro rake started moving from Noapara towards Kavi Subhas. Just before entering the Dum Dum station, a spark occurred on the third rail. Immediately after the spark, smoke was seen coming out. Passengers travelling from Noapara got panic stricken, with similar recent incidents still fresh on their minds. Also Read – Bose & Gandhi: More similar than apart, says Sugata BoseWasting no time, Metro authorities disconnected power supply to the third rail and evacuated the passengers through the driver’s cabin. The engineers were called in urgently. Meanwhile, office-goers came to Dum Dum and other Metro stations to find the services being unavailable. After almost an hour and a half of work, Metro services were resumed. During the disruption, truncated services were on between Kavi Subhas and Girish Park. However, it was not the end of harassment for the passengers as Metro authorities decided to again suspend service between Dum Dum and Girish Park for maintenance work from 1:16 pm. As there was no prior information, commuters faced immense trouble. Normal services were resumed from 2:16 pm.