sentences:  But he sent Chitunda, then Vice President of UNITA, and Elias Salupeto Pena, a UNITA senior advisor, to Luanda to negotiate the terms of the second round.The election process broke down on October 31 when government troops in Luanda attacked UNITA.Civilians, using guns they had received from police a few days earlier, conducted house-by-house raids with the Rapid Intervention Police, killing and detaining hundreds of UNITA supporters.