Congress councillor from Sampangiramnagar R Vasanthkumar joined BJP here on Tuesday.
He joined the saffron party in the presence of Chief Minister B S Yediyurappa, in what is seen as a setback to the Congress in the Shivajinagar constituency.
Earlier, the Congress had expelled two corporators - M K Gunashekhar and Nethravati Krishnegowda - from Shivajinagar constituency for 'anti-party' activities.
For the Shivajinagar bypoll, the BJP has fielded former corporator M Saravana against Congress' Rizwan Arshad and Tanveer Ahmed of the JD(S).
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