MOSCOW — Olympic 2004 hammer champion Olga Kuzenkova is under investigation by the International Amateur Athletics Federation (IAAF) after failing a drugs test, the Russian anti-doping agency (RUSADA) said Friday. “Kuzenkova is facing possible sanctions from the IAAF after a prohibited substance was found in her A sample,” the agency said on its website (www.rusada.ru) without giving any more details. The 42-year-old, who has denied any wrongdoing, retired shortly after failing to qualify for the 2008 Beijing Olympics. Kuzenkova is the latest Russian athlete to face sanctions. — Reuters