There are a couple of stories in the MSM about prisoners who escaped in Natal during the extreme violence. Like these:-
20 prisoners are on the run from a group of 31 who escaped during the violence: https://www.sowetanlive.co.za/news/south-africa/2021-04-28-at-least-20-prisoners-on-the-run-in-kzn-after-gunmen-intercept-prison-van/
One Black died trying to escape from prison: https://www.news24.com/news24/southafrica/news/brazen-escape-attempt-at-kwazulu-natal-prison-1-inmate-killed-20210712
But I have come across references, which seem to indicate that the Zulus were trying to create a massive jail break at a jail whose name begins with "West". And the suggestion is that possibly, 9,000 prisoners escaped. I cannot be certain. But I’m looking for more info on this.