Pannun’s Sikhs for Justice group did not immediately respond to a request for comment sent to an email address listed on its website. Air India did not immediately respond to a request for comment.
India banned the SFJ as an “unlawful association” in 2019 and listed Pannun as an “individual terrorist” in 2020.
Pannun is a resident of the United States, the NIA said that year. Media have said he has dual citizenship in the United States and Canada. The SFJ has offices in Britain, Canada and the United States, it says on its website.
The threats come as Canadian agencies investigate “credible” allegations linking Indian government agents to the June killing of a Sikh separatist leader, which frayed ties between the two countries. India has rejected Canada’s suspicions.
In the wake of the threats, investigations have been launched in Canada, India and some other countries where the airline, owned by the Tata Group conglomerate, operates, the NIA said in its statement.
Pannun has also previously threatened to disrupt railways and thermal power plants in India, the agency said.