Rebel Lok Janshakti Party members will merge with Janata Dal United on June 24 at a meeting in Patna, said the leader of the rebel camp, Narendra Singh.
The dissolved assembly had 29 LJP legislators. In May, a majority of them revolted against LJP chief Ramvilas Paswan and announced their support to JD-U leader Nitish Kumar.
Singh said only 7 former LJP MLAs were in the Paswan camp now.
Meanwhile, Paswan expelled two rebel party leaders for anti-party activities on Sunday.
LJP spokesperson Sanjay Singh said in Patna that the party had expelled Ramashray Prasad Singh and Awadesh Kusawaha from the party for six years.
They two former MLAs were paraded before President A P J Abdul Kalam by the National Democratic Alliance recently.
Last month LJP expelled seven LJP members including party rebel MLAs and chief of the dissolved Bihar LJP unit, Narendra Singh.