In an attempt to disrupt the negotiation process in 1993, Terre'Blanche led an armed invasion of the World Trade Centre in Kempton Park while negotiations to end apartheid were in progress.[24] After a memorandum of grievances was presented to National Party minister Roelf Meyer and Dawie de Villiers and after an agreement that no arrests would be made, the AWB withdrew from the premises.[25] That evening several identified AWB leaders were arrested and their wives were incarcerated in Soweto, separately from their husbands.[26] Vlakplaas General Krappies Engelbrecht was appointed to launch an investigation.[27]