ADVERTISEMENT About 600 North Korean troops have been killed fighting for Russia against Ukrainian forces, South Korea’s spy agency told lawmakers on Wednesday. North Korea has suffered some 4,700 casualties — including injuries and deaths — the South Korean National Intelligence Service (NIS) told a parliamentary committee. About 2,000 injured soldiers were repatriated to North Korea by air or train between January and March, according to the NIS. The dead soldiers were cremated in Russia