Thirsty monkeys!

From a Rueters report:

A group of thirsty monkeys stoned a herdsman to death in drought-stricken northern Kenya as he watered his livestock in February, 2000. "In a clear sign of worsening drought, a herdsman was killed after riotous monkeys stoned pastoralists at a watering point in Wajir district," the East African Standard newspaper said. A nurse in district said the man died from severe head injuries.