How did Cassandra die?

The movie "Troy" removed the role of Cassandra, one of the children of Priam and Hecuba of Troy. Cassandra had been gifted with prophecy, but cursed with the inability to make others believe her prophecies. Agamemnon took her as a war prize and concubine, and returned with her to Greece to his wife Clytemnestra. Clytemnestra was jealous, and still angry with Agamemnon for having killed their daughter Iphigenia at Aulis, so she (or her lover, Aegisthus, Agamemnon's cousin), killed Agamemnon and Cassandra. The son of Clytemnestra and Agamemnon, Orestes, revenged his father's death by killing Clytemnestra.