TSHWANE - Tshwane authorities say there's no evidence linking protests in the capital to xenophobia.
Foreign-owned shops were looted during Wednesday's chaos.
Taxi drivers say they're targeting drug dealers and users.
Tshwane Road and Transport MMC Sheila Senkubuge said the taxi industry isn't fighting with foreign nationals.
"It seems to be a case of alleged drug lords and drug users. The taxi drivers have felt a need to protect their streets and that's how this happened," said Senkubuge.
"We don't condone vigilantism, we are leaning on law enforcement to handle this situation but I don't believe that's it's a case of xenophobia or fighting against Nigerian nationals.
"It's a genuine concern that the entire city has about in the increase of drug use and drug sales within the CBD," she said.