Bhadra Singh alias Sonu Singh along with his supporters joined the BJP here today.
Singh was elected MLA thrice from Isauli seat in Uttar Pradesh's Sultanpur district.
The former MLA along with his supporters had joined the BJP, UP BJP vice-president Hardwar Dubey and general secretary Ramnath Kovid said in a statement here.
Singh was earlier in the Samajwadi Party and the Bahujan Samaj Party.