KARACHI, Sept 13: Prof Syed Raziuddin Sher, a former head of the chemistry department of S. M. Science College and father of Dawn subeditor Ambreen Arshad, died of a heart attack here on Monday and was buried in the afternoon. He was 74. He is survived by besides the wife, a son and a daughter. Soyem for the late professor was held at his residence on Tuesday.