Officials in Kenya say armed raiders in the country's north have attacked and killed at least eight police, and 12 more are missing.

Police Inspector General David Kimayo said Saturday that the police officers were ambushed after traveling to the site of an earlier attack on police that killed three.

The violence stems from a feud between two rival tribes in the Turkana region.

A police statement said reinforcements had been sent to the region and that authorities would release more information Sunday when the picture was clearer.