The mixed relay, a new event for Tokyo 2020 involving two men and two women, was won by France in a photo finish from Great Britain after a nail-biting final sprint.
The International Triathlon Union shelved the swimming leg after tests showed levels of e-coli more than double the acceptable standard.
Patrick Lange and Daniela Ryf defended their Ironman World Championship titles by breaking the men's and women's course records respectively.
Jumpei Furuya and Yuko Takahashi won gold medals in the men's and women's triathlon respectively.
No post-accident investigation will help us avoid future tragedies if we are not professional in our work to begin with.
The victim from Hong Kong drowned while taking part in the 2018 Port Dickson International Triathlon yesterday.
Youth and Sports Minister Syed Saddiq Syed Abdul Rahman says it will look at, among others, whether any law has been broken.
During preparations for the 2020 Tokyo Olympics, the three sports have been plagued by various issues.
World champion Flora Duffy claimed triathlon gold for tiny Bermuda and Canada's Joanna Brown took bronze just a month after breaking her shoulder as the Commonwealth Games got underway Thursday.