St Kitts and Nevis sprinter Kim Collins dramatically dropped out of the Olympic 100m heats after falling out with his team for visiting his wife.

The 36-year-old, who won the 2003 world 100m title, said on Twitter:  "My fans. I won't lie. Won't be running."

Collins carried the St Kitts and Nevis flag at the opening ceremony but the country's Olympic Committee said they had not heard from him for three days.