A 'Viper' armoured vehicle was used to crash through the glass windows of the WTC allowing supporters, carrying firearms and chanting "AWB", to invade the premises. Police attempted to form a cordon to prevent the invasion but were ineffective. A police captain who tried to prevent the vehicle from breaking through was assaulted and suffered internal bleeding. Once inside, the right-wingers were effectively left in control of the building while the multi-party negotiation delegates took cover by hiding in meeting rooms. The protesters painted slogans on the walls, urinated over furniture, and harassed delegates. Damage was estimated at more than 700,000 Rand.