A seven-year-old boy and his nine-year-old sister, who were kidnapped from their mother’s house in the Karos district in Upington a week ago, have been found dead. The pair, Mariette and Estevan Olyn, were taken from their home last Friday by a man their mother apparently knew. Their bodies were found in a deserted house outside Karos. Police suspect the killer used a panga to murder the children. Police could not say why the mother only reported the incident on Monday – three days after the children were kidnapped.