Usain Bolt delivers on his top billing by winning the 200metres at the London Diamond League but he is upstaged for once as American sprint hurdler Kendra Harrison breaks one of the oldest world records in the book.

A further 45 athletes test positive for banned substances after a second set of samples were re-analysed from the London and Beijing Olympics.

The Court of Arbitration for Sport says it had rejected Russia's appeal against the exclusion of its track and field athletes from the Rio Games starting on August 5.

The report to be released Monday into allegations of widespread state-sponsored doping in Russia has already sparked rumblings it could trigger the "nuclear option" of a full ban of Russia from the Rio Olympics.

A Brazilian Islamist militant is plotting an attack against the French delegation at the Olympics in Rio de Janeiro, the head of a French intelligence agency says.

The International Olympic Committee approve 'wild card' entries to the Olympic Games for two Bangladeshi athletes, Mahfuzur Rahman Sagor and Sonia Akhter Tumpa.

Brazil interim President Michel Temer welcomes the world to Olympic Games with open arms.

Parts of a mutilated body wash up on the sands of Copacabana Beach in Rio de Janeiro on Wednesday, just meters (yards) from where beach volleyball athletes will compete in the upcoming Olympics.

Usain Bolt will embark on the first major test of what he plans to be a triumphant swansong Thursday as the Jamaican Olympic athletics trials get under way.

Rio de Janeiro's governor declares a state of financial emergency and requests federal funds to help fulfill obligations for public services during the Olympics that start August 5.

Russia's athletes should stay banned from international competition and not be allowed to take part in the Rio Games, says a leading Olympic official.

Scandal-hit Russia will likely discover Friday that it has not done enough to get back into world track and field's governing body, the IAAF, in time for its athletes to compete at the Rio Olympics.

Despite financial and organisational problems that have delayed other construction projects for the Rio de Janeiro Olympics, the largest athletes' village in the long history of the Games is unveiled in the city on Wednesday.

Scientists find dangerous drug-resistant "super bacteria" off beaches in Rio de Janeiro that will host Olympic swimming events and in a lagoon where rowing and canoe athletes will compete when the Games start on August 5.

Olympic long jump champion Greg Rutherford decides to freeze his sperm because of fears about the Zika virus at this year's Games in Rio de Janeiro.

Selim Reza, a physically challenged boy from Kushtia, hoggs the limelight on the opening day of the 32nd National Junior (age-level) Athletics Championships despite finishing fourth in the high jump event at the Bangabadhu National Stadium.

A senior International Olympic Committee (IOC) official says he takes allegations of illegal payments to help Tokyo secure the 2020 Games "seriously" but said his group will not conduct a probe of their own.

Brazilian investigators expand their probe into possible corruption around the staging of the Olympic Games in Rio de Janeiro this August to include all the venues and services financed with federal funds, a lead prosecutor told Reuters.

As Rio de Janeiro prepares to play Olympic host, one art exhibit is flying a less than celebratory five-ring flag portraying five youngsters shot dead by police in this often deadly city.

Russia's sports ministry says on Wednesday it fully supports actions by the International Olympic Committee (IOC) to bar athletes who dope from competitions, but said clean athletes should not be excluded from the Rio games.