A past crime scene. [Photo: KLR]

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A police officer in Makueni caused a scene after he shot his colleague dead and injured two others.

The incident on Wednesday night left the crime scene reeking of human blood.

 Area police boss Bosita Omukolongolo said rogue officer fled with his rifle.

"The officer is at large but we are looking for him. We are yet to know why he shot his colleagues," he told the media at his office.

Those injured were taken to Makueni Level Four Hospital.

Omukolongolo said a manhunt for the officer has been started.