Jumper Ruth Usoro, sprinter Favour Ofili and eight other Nigerian athletes were disqualified from the track and field events of the Tokyo 2020 Olympic Games.
Checks also showed that the names of the athletes mentioned above were missing from the Tokyo 2020 Olympics portal for athletes.
A statement by the Athletics Integrity Unit showed that Nigeria accounted for 50 per cent of the 20 disqualified athletes, with 10 athletes.
Further checks showed that only 12 athletes in the track and field events are left in the Tokyo Olympics portal for Nigeria.
The athletes left on the portal are Enoch Adegoke, Tobi Amusan, Ese Brume, Chukwuebuka Enekwechi, Patience George and Usheoritse Itsekiri.
Others are Samson Nathaniel, Grace Nwokocha, Divine Oduduru, Ifeanyi Ojeli, Blessing Okagbare and Imaobong Uko.