Track and field's world governing body the IAAF says the six all tested positive during out-of-competition testing in June in the Russian city of Saransk, home to a training facility with links to more than a dozen previous doping cases.
Among those suspended is Elmira Alembekova, who won European gold last year, and Mikhail Ryzhov, winner of the silver medal in the 50-kilometer race at the 2013 world championships.
