- Mr Kejriwal has been at loggerheads with the centre over metro fare hike
- This was third metro launch that he has not been invited to since 2015
- All three times PM Modi inaugurated the lines
Mr Sisodia also tweeted that Mr Kejriwal was not invited to the inauguration of the 12.38-km-long metro section between south Delhi and suburban Noida because the centre was afraid he might publicly demand a rollback of a hike in metro fare.
"Not calling the Delhi chief minister in an inauguration of a Delhi Metro project is an insult of the people of Delhi. There's only one reason behind not inviting Kejriwal, the fear that he may urge the prime minister to roll back the fare hike (sic)," Mr Sisodia said.
Mr Kejriwal's Aam Aadmi Party has also accused the Narendra Modi government of "hatred" towards the Delhi chief minister.
Of the nine stations on the Magenta Line between Kalkaji temple in Delhi and Noida's Botanical Garden, seven are in Delhi and only two are in Noida.
Mr Sisodia tweeted his criticism within minutes of PM Modi inaugurating the Magenta line. On cue, AAP leaders and volunteers started tweeting with the hashtag #TakeCreditButReduceFare