The Metropolitan Police said Russian German Gorbuntsov was shot with pistol. They are asking for help to find a suspect who was seen running away. He is described as being white, slim, 6 ft tall and wearing a hoodie.
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The FCO updated its travel advice for all destinations across the globe, saying British nationals faced a "heightened threat" of attack.
State-run television KRT showed Kim still using a walking stick as he inspected the airport being constructed in the capital.
The loss is a tragedy for this small tight-knit team that dreams of making the trip into space accessible to travellers not just astronauts.