Four people were arrested in Johannesburg, South Africa, in the shooting of a Rwandan dissident, police said.
A police spokesman said more arrests were likely in the shooting of Lt. Gen. Faustin Kayumba
Nyamwasa, who was recovering in a hospital following Saturday's shooting, the BBC reported Monday.
Rwandan officials deny involvement in the shooting of Nyamwasa, a critic of Rwanda's president.
Nyamsawa's wife, Rosette, said the attack was an assassination attempt.
Nyamwasa, a one-time confidante of Rwandan President Paul Kagame, left Kigali in February following a military shakeup and has since accused the president of corruption, which Kagame denies, the British broadcaster said.
The Nyamwasas were returning from shopping around midday Saturday when a gunman approached their car, Rosette Nyamwasa said. She said the gun went off as her husband bent over.
"And fortunately, it went into the stomach and not in the head," Nyamwasa said.
She told the BBC Kagame said publicly "he will actually kill my husband, that wherever he is he will follow him and kill him."
Rwanda's foreign minister, Louise Mushikiwabo, said in a statement Kagame's government "does not
condone violence" and that she believed South Africa would investigate the shooting thoroughly.
Mushikiwabo told the BBC there was evidence that Nyamwasa was responsible for acts of violence in
Rwanda.
"I'll not speculate much more, as this is a case that has yet to be prosecuted, but there are very
serious charges against him on his links with networks that have been planting grenades in the
country since the beginning of the year," she said.