MONTREAL: The World Anti-Doping Agency said on Sunday it had launched an investigation into a possible glitch in drug-testing kits which could allow sample bottles to be opened manually. WADA said in a statement it had been alerted by an accredited laboratory in Cologne that bottles manufactured by Swiss manufacturer Berlinger could be opened after being frozen. The glass containers, known as the BEREG-KIT Geneva, were touted as the next generation of sample bottles after being released last year in the wake of the Russian doping scandal that dogged the 2014 Winter Olympics. It was not clear if the new Berlinger bottles were due to be used at next month’s Winter Olympics in Pyeongchang.