Japan chief cabinet secretary says he hasn't heard of major violations of infection measures among athletes

Japanese chief cabinet secretary Katsunobu Kato said on Wednesday he hadn't heard of any major violations of infection prevention measures among athletes, certainly nothing severe enough to warrant pulling their accreditation.

He added that his understanding that what violations there have been were minor and "mostly due to carelessness."

The Olympics open on July 23 and last until Aug. 8 and are being held without spectators and under tight infection prevention measures.