India on Thursday described as a “matter of concern” the US charging an Indian national with conspiring to kill a Sikh separatist on American soil, and asserted that a high-level probe committee will investigate all aspects of the case.

India has constituted a probe team to investigate allegations relating to the foiled plot to kill Gurpatwant Singh Pannun, a Sikh extremist and known to be an American and Canadian citizen.

On Wednesday, US federal prosecutors charged Indian national Nikhil Gupta of working with an Indian government employee in the foiled plot to kill Pannun.

US prosecutors informed a Manhattan court on Wednesday that authorities in the Czech Republic arrested and detained Gupta, and he is currently awaiting extradition to the US.

“As regards the case against an individual that has been filed in a US court allegedly linking him to an Indian official, this is a matter of concern,” External Affairs Ministry spokesperson Arindam Bagchi said.

“We have said and let me reiterate that this is also contrary to government policy,” he said at a media briefing.

Bagchi said the “nexus between organised crime, trafficking, gunrunning and extremists at an international level is a serious issue for the law enforcement agencies and organisations to consider and it is precisely for that reason a high-level inquiry committee has been constituted and we will obviously be guided by its results.” The MEA spokesperson said the US side shared some “inputs” pertaining to nexus between organised criminals, gun runners and terrorists and that India takes such inputs seriously since they impinge on “our national security interests as well” and that relevant departments were examining the issue.