Roderigo, having been manipulated by Iago, attacks Cassio in the street after Cassio leaves Bianca's lodgings. Cassio wounds Roderigo. During the scuffle, Iago comes from behind Cassio and badly cuts his leg. In the darkness, Iago manages to hide his identity, and when Lodovico and Gratiano hear Cassio's cries for help, Iago joins them. When Cassio identifies Roderigo as one of his attackers, Iago secretly stabs Roderigo to stop him revealing the plot. Iago then accuses Bianca of the failed conspiracy to kill Cassio.