Leading Rwandan opposition politician Seif Bamporiki has been shot dead in South Africa, where he lived in exile.
Mr. Bamporiki was taken out of his vehicle in a township in Cape Town before being killed, police said.
Preliminary investigations have shown he died in a robbery, police said. But the party of mr. Bamporiki, the Rwanda National Congress (RNC), said the motive was still unclear.
Rwanda was earlier accused of targeting dissidents in South Africa.
It has consistently denied the allegation.
The RNC was formed in exile by opposition politicians who accused the government of President Paul Kagame of being authoritarian and of being intolerant of discord.
Mr. Bamporiki operated a bed shop in Cape Town. He was delivering delivery in Nyanga on Sunday when he was shot after being confronted by two men, police said.
“The deceased was pulled out of his vehicle and shot while the 50-year-old man who accompanied him managed to escape unharmed.
“The suspects yet to be arrested fled in the deceased’s vehicle, and we have reason to believe the motive for the murder was robbery,” police added in a statement to the BBC.
Etienne Mutabazi, spokesperson for the RNC, gave another report and said Mr. Bamporiki died after a gunman fired a single shot through the car window.
It has been speculated on social media that Mr. Bamporiki died in a political hit, but Mr. Mutabazi said he did not know if this was the case, reports the BBC, Nomsa Maseko, from the capital Johannesburg, South Africa.
Nyanga is known as one of the most dangerous townships in South Africa, with a high crime rate, she adds.
Rwanda’s former intelligence chief and founding member of RNC, Patrick Karegeya, was assassinated in a hotel room in Johannesburg in 2014.
Another founding member of the RNC, former army chief Gen. Faustin Nyamwasa, was shot and wounded in Johannesburg in 2010.
The attacks caused a major diplomatic battle between South Africa and Rwanda in 2014.
South Africa has suspended three Rwandan diplomats after accusing them of links to the murder and attempted murder of Rwandan dissidents living in the country.
The government of Rwanda has rejected the allegation.