Samajwadi Party suffered a major set back on Saturday night as key aide of Mulayam Singh Yadav and Samajwadi party MLA Raja Bhaiya alias Raghuraj Pratap Singh along with one more MLA, one MLC and one MP of Samajwadi party have been arrested after they allegedly had beaten up the supporters of a BSP candidate on Saturday ahead of block head election. The arrested MP Shailendra Kumar who represents Kaushambi Lok Sabha seat, Bihar MLA Vinod Saroj, MLC Akshay Pratap Singh alias Gopalji were arrested from Kunda while Raja Bhaiya was intercepted from Allahabad.