According to the US, India needs to investigate the Pannun case.

May 7 :
On May 6, in response to a question regarding New Delhi's investigation into claims of an attempt to kill India-designated terrorist Gurpatwant Singh Pannun in the United States in 2023, the US State Department stressed that India should "very seriously investigate" the matter.

Our patience will be tested when the findings are announced by the Indian government's committee of inquiry, which has been established to investigate the matter. While speaking to reporters at his daily news conference on May 6, State Department Spokesperson Matthew Miller made it very apparent that the matter is being taken seriously by both the department and lawmakers.

Miller made these comments in answer to a query on a Washington Post story that suggested the role of a Research and Analysis Wing (RAW) officer in relation to the case (citing anonymous sources).

Indian Home Ministry terrorist lists include Pannun, general lawyer for Sikhs for Justice (a New York-based organisation).

Let the Department of Justice provide a detailed statement regarding the indictment that was returned in the United States. I would like to add one last thing: the State Department has always made it plain that they believe India should investigate these claims thoroughly, as was stated when they were first made public.

Miller added, "I would refer you to the Canadian authorities to speak to the details of the investigation there" in response to a separate query regarding the arrest of three people linked to the killing of Hardeep Singh Nijjar, who was branded a terrorist by India.

The Canadian government sought Nijjar, who had emigrated to the country in 1997 and obtained citizenship in 2015, on suspicion that he was a terrorist. In June of last year, he was murdered in the parking lot of a Sikh temple close to Vancouver, on the west coast of Canada, by gunmen.

Canada and India were embroiled in a diplomatic crisis after Prime Minister Justin Trudeau publicly implicated Indian intelligence in the murder of Hardeep Singh Nijjar. Responding angrily, India branded the claims as "absurd" and temporarily reduced Canadian visas while pressuring Ottawa to remove diplomats.