Head of Russia's anti-doping lab resigns

The head of Russia's anti-doping laboratory has resigned, hours after his laboratory was suspended over accusations it was part of state-sponsored doping programme that experts fear could snowball into an international crisis for the sport. The World Anti-Doping Agency (WADA) has accused Grigory Rodchenkov of being at the heart of a scheme to cover up widespread use of illegal drugs among Russian athletes, including deliberately destroying positive test samples. WADA suspended Moscow's heavily c