Malik, the 2018 Commonwealth Games gold-medallist, had qualified for the Tokyo Olympics in the 125kg category at the World Olympic Qualifier event in Sofia, Bulgaria.
The top two in each weight category are eligible for the Olympic quota place. In the 57kg final, the 19-year-old Anshu will face Mongolia's Khongorzul Boldsaikhan.
The firing took place at the wrestling centre which is adjacent to a private college.
According to police, the firing took place due to an old rivalry.
The qualifying age bracket for the Soldier GD category is 17½ to 21 years while for Soldier Tech (AT), Sol Clk/SKT & Sol Tdn categories, it is 17½ to 23 years.