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Conakry, Guinea • The head of Guinea's Olympic delegation says two athletes did not return to the West African nation after competing at the Rio Olympics.

Atef Chaloub said Saturday that swimmer Amadou Camara disappeared 48 hours before the team's scheduled departure. He said Mamadama Bangoura, who competed in judo, also did not return to Guinea, having disappeared after leaving a message saying she wanted to "try her luck" abroad.

A friend of Bangoura's, who spoke on condition of anonymity to avoid punishment for failing to stop her from fleeing, said she was ashamed she didn't earn a medal and wanted to try "working in a developed country."

More than a dozen African athletes — including several from Guinea — did not return home after the London Olympics in 2012.