JOHANNESBURG - ANC secretary general Fikile Mbalula, admits thugs have infiltrated the party. But, he says, this often happens without the knowledge of leadership. It comes as witnesses at the Madlanga Commission detail links between the party and Brown Mogotsi. He facilitated payments to the party from attempted murder accused, Vusimuzi Cat Matlala. Mbalula is now warning members against 'Comrade Tsotsi', saying the party's integrity commission will deal with those implicated.