NEW DELHI, May 4 -- The arrest of three India nationals by the Canadian police for their alleged role in the killing of Khalistani operative Hardeep Singh Nijjar is likely to confirm the assessment of Indian authorities that Nijjar's killing was the fallout of a gang war and a fight for the control of the resource-rich gurdwaras of Canada. The Canadian government under Justin Trudeau, for the last one year, under pressure from Sikh radical groups and Khalistani pressure groups, has been claiming that Nijjar was killed by Indian intelligence operatives.

Apart from leading the Khalistan Tiger Force, which has been banned by Government of India and being a prominent member of another banned terrorist group, Sikhs For Justice, Nijjar was als...