WICHITA, Kan. (KAKE) – Wichita police say a 70-year-old man shot and killed another man who was armed with a box knife and making threats. 

Officers responded at around 5:10 p.m. Monday to a shooting at an apartment complex in the 700 block of North Broadway. They arrived to find 21-year-old Gabriel Njoroge who had been shot. He died at the scene. 

Police also contacted a 70-year-old man believed to have been involved. 

Police spokesperson Charley Davidson said the investigation revealed there was a disturbance between Njoroge and the 70-year-old man outside the apartments.

"During the disturbance, Njoroge threatened the male and came towards him armed with a box knife," Officer Davidson said. "Being in fear for his safety, the 70-year-old shot Njoroge."

The 70-year-old man has not been arrested. The investigation is ongoing and will be presented to the district attorney's office for a charging decision.