Democratic Alliance (DA) leader, Mmusi Maimane, says he has referred Western Cape Premier Helen Zille to the party's disciplinary structures for investigation.
Maimane referred to Zille's comments on colonialism legacy as "unacceptable and offensive".
Spokesperson to Premier Helen Zille, Michael Mpofu says Zille has unreservedly apologised for her tweets and that she did not mean to defend colonialism.
Mpofu says Zille is willing to comply with whatever processes that have been put in place with regards to her tweets.
This cartoon first appeared on EWN.