South Africa's president has reprimanded Defence Minister Nosiviwe Mapisa-Nqakula and docked her pay for three months for taking a delegation to Zimbabwe on an air force plane, his office said. The opposition Democratic Alliance had accused Mapisa-Nqakula of misusing state resources by letting the group from the ruling African National Congress travel with her to Harare in September. The presidency said late on Saturday Mapisa-Nqakula had been on an official trip. But her decision to let the delegation - who were travelling to Zimbabwe on unrelated business - join her on the flight had been an "error of judgement". The minister had been given a formal reprimand, a "salary sacrifice" had been imposed on her for three months from Nov. 1 and she would have to make sure the ANC reimbursed the state for the costs of the flight, the presidency added.