Chimpanzees in Uganda locked in vicious 'civil war', say researchers – BBC

Chimpanzees in Uganda locked in vicious ‘civil war’, say researchers  BBCThese Chimps Began the Bloodiest ‘War’ on Record. No One Knows Why.  The New York TimesHundreds of chimpanzees are killing each other in a ‘civil war’ — scientists captured the ‘lethal violence’ for the first time  New York PostTwo hundred chimpanzees are embroiled in a ‘civil war’  Scientific AmericanScientists stunned as chimpanzees turn on friends in killing spree  Reuters