Prime Minister Narendra Modi, who arrived in the Arunachal Pradesh capital Itanagar to participate in the state's 29th foundation day, flagged off the Naharlagun-New Delhi Express by pressing a button at a function held in Indira Gandhi Park in Itanagar.
The prime minister hoped the boost in communication through the railway would propel growth and development in Arunachal Pradesh and other parts of the northeast.
Modi, who was accompanied by railway minister Suresh Prabhu, minister of state for Railways Manoj Sinha and minister of state for Home Kiren Rijiju, also inaugurated an inter-city train between Naharlagun and Guwahati and laid the foundation stone of a 132 KV power transmission project and another project to avail pure drinking water for the residents of capital town.
President Pranab Mukherjee's visit to the state last year had also drawn sharp a reaction from China, which has often laid claim to the state.
(Also see: Hydel power the key to prosperity, PM Modi tells Arunachal and China formally protests PM's visit to 'disputed' Arunachal)