The final leg of Grand Slam Track - the athletics competition backed by Olympic great Michael Johnson - is cancelled, sources tell the BBC.

Grand Slam Track has canceled the final meet of its first season, in Los Angeles, leaving the host of the 2028 Olympics and the country’s second-largest city without a major track meet this summer.

The June 28-29 event at LA's Drake Stadium was the fourth and final meet of the inaugural season after the series began in April in Kingston