"Indian authorities should ensure a credible and independent civilian investigation into whether SSB personnel used unnecessary or excessive force.
"Where there is sufficient admissible evidence, suspects should be prosecuted in a civilian court," Executive Director at Amnesty International India, Aakar Patel said in a statement.
The Indian Embassy in Kathmandu on March 9, however, had said that there was no incident of firing by the SSB, India's border-guarding force.
Govinda Gautam, of Kanchanpur district, was killed in alleged firing from the Indian side at Nepal-India border following a dispute over building a culvert over the Sano Khola river in Kanchanpur district, Kantipur Television had reported.