A South African man has been charged with murder after his brother was hacked to death in front of his pupils near the northern town of Polokwane

Guilford Shapo, a teacher at Masehlong Primary School, was attacked while invigilating an exam. His younger brother Happy Shapo has been charged with the crime, police spokesperson Ronel Otto said. "We were alerted by the pupils as they screamed and ran out of the mobile classroom," said Noko Moabelo, the headmistress of the school in Ga-Mmasehlong village in Limpopo province. "Mr Shapo was the only male teacher at the school. As women, none of us could take the risk of approaching the suspect," she said. Neighbors alerted by the screams rushed to the school to stop the machete attack. Guilford Shapo died later in hospital from his wounds. South Africa's murder rate is among the highest in the world with more than 40 killings a day.