Bel'kor was an engineer in the Klingon Defense Force during the 2260s.

In 2267, Bel'kor served as the chief engineer of the IKS Gr'oth when the ship encountered the USS Enterprise at Deep Space Station K-7. Bel'kor was responsible for informing Captain Koloth that the Enterprise had beamed a load of tribbles onto the ship before it left the space station. When Koloth suggested multiple ways of eliminating the tribble infestation, Bel'kor was forced to explain that each suggestion was impossible. (TOS - Strange New Worlds 9 short story: "A Bad Day for Koloth")

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