This led to the AIADMK's strength in the 235-member assembly come down to 150. The DMDK is the second largest party in the house with 29 membres, followed by the DMK with 23.
This will be the fourth assembly by-election in Tamil Nadu after the AIADMK took power in May 2011. The AIADMK won all three earlier elections at Pudukottai, Sankarankoil and Tiruchirapalli (West) constituencies.
The election will take place Dec 4 and the vote count Dec 8.
