Officials of Federal Security Service administration over Nizhegorodskaya oblast detained a passenger with pistol TT and military grenade PGD-5 with fuse in train Moscow-Kazan. This was informed in service of operative regional Russian Emergency Ministry administration. "Operation was realized on station "Arzamas-2", on territory of Nizhegorodskaya oblast, where train makes long stop. Detained was taken from the train, which followed the route afterwards", - noted the source. Investigation has started.