The decision of cabinet expansion was taken at a meeting of the BJP core committee on Monday night following several rounds of discussions in the presence of the party's central leadership.
The 15.6-km-long railway link will connect Gangasagar in Bangladesh to Nischintapur in India, and from Nischintapur to Agartala railway station.
He is scheduled to hold meetings with the party's state leaders and later address a press conference before leaving for Kolkata.
The police have not given any official reason for the detention. However, according to Manik Das, Superintendent of Police West Tripura, the team was in the state "for some research-related work".
Singh, who is the Minister of State for Development of North Eastern Region, said the airport at Itanagar will be functional by the end of the year and that a facility is also coming up at Kohima.
Yadav, who was accompanied by a group of policemen, raided the wedding hall, beat up the elderly priest and shoved the groom before asking the cops to arrest the people gathered there