Armed raiders ambushed a group of herders in Turkana on Thursday afternoon killing four of them.
Turkana police boss Samwel Ndanyi said one of the raiders, who are suspected to come from Ethiopia, was killed in the attack.
The herders had just arrived at River Nakuwa to water their livestock when they were attacked, the police boss said.
“One of our police reservist was injured and nearly 350 livestock belonging to six families were stolen, “Mr Ndanyi said.
The police boss said response by security agents was delayed because of poor terrain.
He added that security patrols have been intensified at the troubled Ilemi Triangle, a disputed area claimed by Kenya, Ethiopia and South Sudan.
“I appeal to our pastoralists to refrain from grazing on disputed border areas where security is unstable. Currently, we have adequate pasture at safe grazing fields,” Mr Ndanyi said.