Gold medal cyclists Bao Shanju and Zhong Tianshi wore the badges during a medal ceremony yesterday, in a potential breach of Olympic rules on the display of political paraphernalia.

“We contacted the Chinese Olympic Committee and asked them for a report on the situation,” IOC spokesman Mark Adams said.

“We are looking into the matter.”

The duo wore the badges, commonplace in China for half a century but a potential breach of Rule 50 of the Olympic charter, after retaining the women’s cycling team sprint title at the Izu Velodrome.

While the IOC last month relaxed Rule 50 to allow gestures, such as taking the knee on the field of play provided athletes do so without disruption and with respect for fellow competitors, they have banned any such gestures on the podium.

The IOC are also investigating a gesture made on the podium by American shot put silver medallist Raven Saunders which the US Olympic and Paralympic Committee (USOPC) ruled was not disrespectful of any other competitors.

Saunders raised her arms in an X above her head, which she later indicated was an expression of support for the oppressed.

The USOPC said the gesture did not breach their rules as it was a “peaceful expression in support of racial and social justice (that) was respectful of her competitors”.