Chennai, Oct 23 (UNI) Expressing their strong opposition to mass deletion of voters and reiterating their demand for the ouster of Chief Election Commissioner (CEC) C.Gyanesh Kumar over SIR row, a majority of political parties in Tamil Nadu, including the INDIA Bloc of which the ruling TVK headed by Chief Minister Vijay was a partner, the Opposition DMK and Naam Tamizhar Katchi (NTK) walked out of the All Party meeting on Special Summary Revision (SSR) of electoral rolls convened by the Election Commission of India (ECI), on Friday.