Four Olympic weightlifting gold medalists from Kazakhstan face sanctions after their doping samples were positive in retests from the 2012 London Games. The four champions were among 10 athletes from five former Soviet countries whose samples revealed banned substances. The International Weightlifting Federation said this late yesterday. If all four are disqualified, Kazakhstan would drop from 12th to 23rd in the 2012 medal standings. The four Kazakhs included men's 94-kilogram champion Ilya Ilyin, and women's gold medalists Zulfiya Chinshanlo (53kg), Maiya Maneza (63kg) and Svetlana Podobedova (75kg). The IOC is retesting samples to catch cheats who might be competing at the Rio de Janeiro Olympics in August.