Federal prosecutors have charged Lawrence Bishnoi, 33, and Satinderjeet “Goldy Brar” Singh, 32, both of Punjab, India, with ordering the assassination of Nijjar, referred to as “HSN” by prosecutors.
Brar remains at large. Bishnoi has been in prison in India since 2015.
Last year, Canada listed the Bishnoi gang as a terrorist entity, allowing the federal government to seize property and freeze money owned by the group in the country.
In 2024, four Indian nationals were arrested and charged over the killing, which sparked a major diplomatic row between Canada and India. They await trial.
On Tuesday, prosecutors also alleged that Bishnoi gang members targeted prominent religious and political leaders with violence, and then sought to extort members of the community.
The allege that Bishnoi, Brar, and other defendants attempted to extort money from victims in California, demanding in December and January that one victim make a $5m (£3.75m) payment.
Also on Tuesday, law enforcement officials said they had seized as part of the probe approximately 1,000 kg (2200 lbs) of cocaine and 1kg of heroin, along with $40,000 in cash and a dozen firearms.
The FBI, Los Angeles police, the Royal Canadian Mounted Police and US Customs and Border officials participated in the investigation.
