In the dark streets of Cyprus, Roderigo attacks Cassio, who, uninjured, stabs Roderigo. Iago then wounds Cassio in the leg. Othello, hearing Cassio cry out, thinks that Iago has killed him, and departs to murder Desdemona. Iago then kills the wounded Roderigo. While Iago, Lodovico, and Gratiano tend to Cassio, Bianca arrives. Iago accuses her of being a whore and of engineering the plot against Cassio that led to his injury.