The MLAs who joined the BJP were Ngamthang Haokip, Y Surchandra Singh, S Bira Singh MLA and O Lukhoi Singh.
Henry Okram, nephew of former Chief Minister and senior Congress leader Ibobi Singh, Panonam Broken, Oinam Lukhoi Singh, Ngamthang Haokip, Ginsuanhau Zou were inducted into the BJP by its vice president Baijayant Jay Panda.
Before leaving, Biren Singh said that he and the present and former Congress MLAs will meet the BJP central leadership in the national capital to personally introduce and to invite them to join the party.
They cited the lack of trust in the leadership of O Ibobi Singh and said that due to him, the Congress failed to form the government even when it was the single largest party in the state.
Counting of votes is underway in assembly byelection to 58 seats in 11 states including Madhya Pradesh where the results will decide the fate of the Shivraj Singh Chouhan government.