In this Monday, July 8, 2019, photo, locals stand by the bodies of victims recovered in recent tribal violence. Police and soldiers have been sent to Papua New Guinea's highlands to make arrests and enforce peace after more than 20 people, mostly women and children, were slain in recent tribal violence over a feud that has lasted for years. (Pills Kolo via AP)
In this Monday, July 8, 2019, photo, people from indigenous communities in the highlands of Papua New Guinea stand beside the bodies of victims killed in a bout of tribal violence. AP

Papua New Guinea to boost security after mass killing escalates tribal war