Karachi  - Death anniversary of Azim Ahmed Tariq, the slain chairman of the MQM, was observed at the International Secretariat of the MQM in London with reverence.  Fateha was offered for the late MQM leader. Besides, rich tributes were paid to him and other martyrs of the MQM. Altaf Hussain, members of the Co-ordination Committee offered fateha.