One of the more horrifying animal attacks I know of occurred in South Africa in 1964. A pet chacma baboon, which had escaped from its owner, stole a baby from its carriage. It bit through the baby's skull before the mother could stop it.
The method marks this as a predatory attack. Both yellow and chacma baboons have a history of occasionally preying on children. With enormous canine teeth and tremendous strength and agility, the largest male baboons are more than a match for any unarmed human.
But most encounters with baboons involve mugging and burglary, not killing. In South Africa today, baboons are a major urban pest. World Cup soccer fans may soon find out why.