The trial run of the Kolkata-Khulna-Dhaka bus service began here on Friday with an aim to take forward Indo-Bangla bilateral relations.
Three buses were flagged off from 'Nabanna', the state secretariat, as a part of the trial run that will be operational from June, official sources said.
Senior state ministers Partha Chatterjee, Subrata Mukherjee and Firad Hakim flagged off the buses.
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The total time to reach Khulna, including security checks, at the border will be around seven hours, he said.
Earlier bus services were introduced on the Kolkata-Dhaka-Agartala and the Kolkata-Dhaka routes.