MUMBAI, Nov. 24 -- Harbour line services were disrupted for several hours on Sunday after the weekend's 12-hour mega block between Panvel and Belapur was extended by a couple of hours, delaying morning trains on the CSMT-Panvel route. The overnight block, planned from 11:45pm on Saturday to 11:45am on Sunday, was to facilitate the Mumbai Rail Vikas Corporation's (MRVC) work on the upcoming suburban corridor connecting Panvel and Karjat. Rail officials said they had to dismantle and shift tracks, and MRVC officials added that the purpose of the repair work was to extend the platforms by 90m to facilitate the new corridor. Rail officials admitted that the work took longer than expected, pushing the reopening of the line by nearly two hours. However, officials added that the delay began when clearances for the block were issued late on Saturday, causing work to start behind schedule. "The Harbour line services were affected until 1:54pm, and the first local train left Panvel at 2:17pm," a Central Railway (CR) official said. "During this period trains were delayed, so we asked the Navi Mumbai Municipal Transport (NMMT) to operate 40 bus services between the two stations," the CR official added. The Panvel-Karjat new suburban rail corridor, built under the Mumbai Urban Transport Project phase 3 at a Rs.2,782 crore cost, is 80% complete. It is expected to improve connectivity across Navi Mumbai and Raigad, and cut travel time on the CSMT-Karjat route by 20 mins....