ATHENS, Greece (AP) – Russian shot put gold medalist Irina Korzhanenko was under investigation for a positive drug test, international and Russian Olympic officials confirmed Sunday.

Korzhanenko, the first woman to win a gold medal at the site of Ancient Olympia, tested positive for the steroid stanozolol after Wednesday’s competition, Russian Olympic Committee spokesman Gennady Shvets said.

“Nobody can believe that this is actually happening,” Shvets said.

“This is very sad,” a track official said, speaking on condition of anonymity.

The backup B sample was being analyzed to verify the result. Stanozolol is the same steroid that cost Canadian sprinter Ben Johnson his gold medal in the 100 meters at the 1988 Seoul Olympics.

Korzhanenko, 30, lost her silver medal at the 1999 World Indoor Championships after testing positive for drugs. She was banned two years.

Also, Greek weightlifter Leonidas Sampanis was stripped of his bronze medal and expelled from the Olympics for a doping offense, another embarrassment for the host nation after sprinters Kostas Kenteris and Katerina Thanou pulled out amid an IOC investigation of their missed drug tests. He was the first athlete in Athens to lose his medal because of doping.