Responding to questions on an alleged plot from India to murder US-based Khalistani terrorist Gurpatwant Singh Pannun, the External Affairs Ministry today said it is a "matter of concern" and reiterated that New Delhi has launched a high-level probe into the charges. The ministry's spokesperson Arindam Bagchi was responding to the media's questions on allegations that an Indian government employee worked with Indian national Nikhil Gupta and others in a plot to assassinate Pannun, who leads Khalistani outfit Sikhs for Justice. "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. We have said that this is also contrary to government policy," Mr Bagchi said.