Sikandar Butshikan burned six mounds (1 mound is 37 kilos) of sacred threads worn by Hindus after massacring them (Hasan, Tarikh-i-Kashmir).
He killed the Hindus who put a tilak-mark on their forehead (Hasan, Tarikh-i-Kashmir).
Source :- Cambridge History of India, III, p.281
Consider that what will be the number of Hindus who were killed?