-LRB- CNN -RRB- -- A former Mexican senator was reported missing on Saturday , Mexico 's attorney general 's office said . The case has rocked Mexico , with President Felipe Calderon saying he is closely monitoring the investigation into the disappearance of the former official , Diego Fernandez de Cevallos Ramos . The attorney general of the state where Fernandez de Cevallos was reported missing said that authorities have no clues as to his whereabouts . Fernandez de Cevallos was last seen on the ranch of his home in Pedro Escobedo , in central Mexico 's state of Queretaro , the country 's official Notimex news agency reported . The attorney general 's office said that Fernandez de Cevallos ' vehicle was located on his ranch and that `` in the place where the car was located , some of his belongings were found and there were traces of violence . '' Queretaro attorney Arsenio Duran said the former legislator had arrived alone at his La Cabana ranch , as he usually did , at approximately 11 p.m. Friday -LRB- midnight ET Saturday -RRB- and that it was presumed that he was kidnapped in the driveway of his property , Notimex reported . Duran said that around 7 a.m. Saturday -LRB- 8 a.m. ET -RRB- relatives of the former legislator noticed that the door to his truck was open , Notimex reported . Outside the vehicle were discarded glasses , pens and scissors ; inside were traces of blood . The federal attorney general 's office has declined to call the case a kidnapping . Queretaro authorities are investigating the case , the attorney general 's office said . A statement on the Mexican president 's website said that Calderon `` from the first hours of the morning , has been in constant communication with the attorney general and with the secretaries of Interior and Public Security , '' about the investigation . The statement said that Calderon has `` communicated with one of the two children of Fernandez de Cevallos , who is facing this difficult situation with integrity , to offer his solidarity and the necessary backing to successfully locate Fernandez de Cevallos . '' The missing legislator was a senator from PAN , Mexico 's National Action Party , and is a former presidential candidate . The statement on Calderon 's website called Fernandez de Cevallos `` a key politician in the Mexican democratic transition . '' CNN 's Esprit Smith contributed to this report .