Two unidentified gunmen "randomly shot at guests" who were dancing and mingling at a house party in Kwazakhele township, police say. "These victims were killed by criminals, and we will not rest until we find out what happened and who was responsible for [this] callous and cold-blooded attack on these unsuspecting victims," said Eastern Cape Police Commissioner Nomthetheleli Lillian Mene. South Africa has one of the highest gun crime rates in the world but random mass shootings are uncommon