Some analysts say the violence wasn't spontaneous anger but a deliberate strategy of sabotage.
Kenya's Taekwondo star Faith Ogallo hopes to win a medal in Tokyo - to raise environmental awareness.
Some $1bn worth of stock was stolen in KwaZulu-Natal and at least 800 shops looted, an official says.
The Uganda Olympic Committee says a weightlifter is missing from a training camp in Japan ahead of the Tokyo Games.
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