The third anniversary of martyrs of Karsaz twin blasts, who sacrificed their lives in home-coming convoy of Shaheed Benazir Bhutto on October 18, 2007, will be observed with respect and affection on Monday. In this connection, President PPP Sindh, Syed Qaim Ali Shah has directed all district wings of the party to organise programme to remember the sacrifices of martyrs of Karsaz twin-blasts, said a statement.