Liu Chunhong, who won gold in Athens in 2004 and Beijing at her home Olympics four years later in the women’s 69kg class, was among the most high profile listed on the IWF website.
Teammates Chen Xiexia, who claimed gold in the women’s 48kg class, and Cao Lei, who won the women’s 75kg event, in 2008 were also named by the IWF.
All tested positive for the GHRP-2 growth hormone substance while Liu’s sample also contained traces of the banned supplement Sibutramine, according to the IWF.
In total, 11 Beijing medal winners were named by the IWF as having tested positive for banned substances and have been provisionally suspended from the sport.
The athletes were from China, Azerbaijan, Belarus, Kazakhstan, Russia and Ukraine.
“In line with the relevant rules and regulations, the IWF imposed mandatory provisional suspensions upon the athletes, who remain provisionally suspended in view of potential anti-doping rule violations until their cases are closed,” a statement posted on the IWF website said.
“Following the IOC’s decisions, the IWF will be in a position to take over the results management of these cases.
“Should it be determined in any of the cases that no anti-doping violation was committed, the relevant decision shall also be published.
“The IWF will not make any further comments on the cases until they are closed.”
“We will follow the relevant IWF and IOC requirements to actively cooperate with the investigation. If violations are confirmed, people found responsible will not be tolerated and will be severely punished in accordance with law,” a statement translated from the CWA website read.
CNN contacted the weightlifting federations of Russia, Kazakhstan, Belarus, Ukraine and Azerbaijan Wednesday but had yet to receive responses at time of publication.
CNN’s Steven Jiang contributed to this report.