Juan Camilo Mourino, Mexican Interior Minister, has been killed in a plane crash in Mexico City. Mourino was not only the second most important politician in the country, but also a close ally and advisor of President Felipe Calderon. Jose Luis Santiago Vasconcelos, a former high-ranking official at the Unit of Special Investigations on Organized Crime (SIEDO), was also killed in the accident, along with five other persons. The causes of the accident are being investigated.