Bahujan Samaj Party (BSP) expelled four MLAs, including five-time MLA Ram Prasad for indiscipline and anti-party activities on Saturday, November 23.
Three former MLAs from Basti - Rajendra Chaudhary, Doodh Ram and Jitendra Kumar - were also expelled.
BSP Basti district president Sanjay Dhusia said that the leaders had been involved in anti-party activities for the past several months and had been given several warnings.
Sources said that the expelled leaders would now join the Samajwadi Party.
Ram Prasad Chaudhary, a former MP and a minister in the Mayawati government, told reporters that he had not yet made up his mind about it.
"I do not know why the party president Mayawati is upset with me. I resigned from the party on Saturday but soon after, I was served with an expulsion notice. I will continue in politics but have not decided yet which party to join," he said.
The former MP is a prominent Kurmi leader in Basti and wields considerable clout in the region.
Recently, former BSP MLC and former finance minister KK Gautam also joined SP.
(With inputs from IANS.)