The Libyan interim government has confirmed that Muammar Gaddafi’s fifth son and the former national-security adviser Mutassim Gaddafi has been killed. There are reports that another of his sons, Saif al-Islam, who was often seen as the heir apparent to his father, is also dead. It's increasingly clear that Thursday was a bloody day for Gaddafi loyalists. Reports indicate that many of Gaddafi’s top officials were killed, including Abu Bakr Yunis, the former defense minister. Gaddafi’s spokesman, Moussa Ibrahim, and senior Libyan intelligence chief Abd Allah al-Sanusi were captured.