Sitaram Yechury (CPI(M) general secretary), D Raja (CPI general secretary), T R Baalu, MP (DMK parliamentary party leader), Praful Patel, MP (NCP), Sharad Yadav (Lok Tantrik Janata Dal president), Sanjay Singh, MP (AAP), Prof Manoj Kumar Jha, MP (RJD) had addressed a joint memorandum to the president of India on February 28, on the communal violence in Delhi.