Dec 30 (Reuters) - New Zealand"s Zoi Sadowski-Synnott, Nico Porteous and his older brother Miguel have tested positive for COVID-19 five weeks before the start of the Beijing Winter Olympics, local media reported on Thursday. Sadowski-Synnott and Nico Porteous, both 20, won bronze medals in snowboarding and freestyle skiing respectively at the 2018 Winter Games in Pyeongchang. The athletes were preparing for the Dec. 30-Jan. 1 World Cup events in Calgary, Canada and have reported mild symptoms, New Zealand"s 1News said. The Beijing Games begin on Feb. 4.