The man was arrested in Paarl in connection with the shooting of the six anti-gang members who were tracing suspects in the Sweet Home Farm informal settlements, near Nyanga.
Two of the gang unit members were left in critical condition.
Police minister Bheki Cele addressed the media at the Melomed Gatesvill Private hospital, in Athlone, where the critical wounded members are fighting for their lives.
The minister said the Samora Machel area would be under lockdown for 72 hours while police search for the suspects.
“Life will be difficult for the people of Samora when 200 police officers comb the area by going door to door in a grid pattern until they find the suspects,” he said.
“We are going to up the game. We have one gun now that we believe was used in this thing.”
The unit was launched eight months ago as an effort to curb the rising gang violence that’s infiltrating the province. However, the numbers of the violence have yet to drop.
This past weekend, 14 people were reportedly killed in another gang-related violence in Delft.
According to The City of Cape Town’s Shot Spotter detection system about 400 gunshots had been registers in the first three months of this year, in Hanover Park.
The system also did show a significant drop in the figures from month to month and other hotspot areas are now considered “stable”.
The Western Cape Premier Alan Winde also reported that there had been 2 206 murders in the province since the anti-gang unit came into existence.
Cele blamed the design of the Cape Town’s neighbourhoods for the failure of the police to irradiate gang violence.
While Winde blamed the police department for short-staffing and under-resourcing for violence in Western Cape.