
According to Engineer Police Station OCPD, Mohammed Huka, the incident occurred in the wee hours of Thursday after the officers had a disagreement.
Sergeant Solomon Wainaina was pronounced dead on arrival at Kinangop hospital where he was rushed after the attack.
According to the OCPD, Justus Mwangi Ndiang’ui, using a G3 gun, pumped nine bullets into Wainaina killing him on the spot.
A police officer who witnessed the incident said the sergeant had earlier picked a quarrel with his junior Mr Mwangi over the night duty shift.
The suspect returned from the night duty, found his senior in his office and they quarreled for a second time before he shot the sergeant using a G3 Rifle.
The suspect was arrested on scene and an investigation into the incident launched.