Australia athletics team in isolation day before track events begin

American pole vaulter Sam Kendricks is out of the Games after positive Covid test

Sam Kendricks (L) of the USA 

American double world champion pole vaulter Sam Kendricks has been ruled out of the Olympics after testing positive for COVID-19, leading to members of the Australian team being put into isolation on Thursday.

United States Olympic and athletics officials confirmed Kendricks' positive test, tweeting: "The health and safety of our athletes, coaches and staff is our top priority.