Bangalore, Sep 27 (ANI): A special court in Bangalore on Saturday convicted Tamil Nadu Chief Minister Jayalalithaa in the 18-year-old disproportionate assets case. A special court in Bangalore dealt a big blow to the AIADMK leader, who has become the first chief minister to be convicted in a wealth case. The quantum of sentence is expected to come soon. Jayalalithaa will now lose MLA's post and will have to step down as Tamil Nadu Chief Minister. She has been charged with accumulating Rs 66 crore wealth through dishonest means during her first tenure as chief minister from 1991 to 1996. Earlier, as the charges were being read against all the accused, unprecedented security was put up around the DMK ministers' residence in Chennai and also outside the Bangalore court.