MOSCOW (Reuters) - B-samples of two Russian female weightlifting medalists from the 2008 Olympics have tested positive for banned substances, TASS news agency on Tuesday quoted the coach of one of them as saying.

Marina Shainova won a silver medal at the 2008 Olympics in Beijing, and Nadezhda Evstyukhina won a bronze medal at the same Games.

"The B-sample has tested positive for turinabol," Shainova's coach Vladimir Shainov told TASS. "We haven't decided yet what to do ... now, certainly, her medal will be taken away and she will be disqualified. Evstyukhina is in the same situation."

(Reporting by Alexander Winning; Writing by Dmitry Solovyov)