Six police officers have been killed by herders in volatile Laikipia County.

The report seen on Wednesday by the Associated Press said herders from the Pokot Community opened fire at the Laikipia Nature Conservancy and killed the officers.

The officers were inside a pair of vehicles and part of a unit that works to prevent livestock thefts.

The report says four other officers were wounded in the attack.

Hundreds of semi-nomadic herders invaded private ranches late last year to save their cattle from a prolonged drought.

The Laikipia Farmer Association says the herders are camping on its members' land and trying to take it over.