By Dialogo June 16, 2010 The police forces of Argentina, Bolivia, Brazil, Colombia, and Peru and Interpol are investigating the location of a small plane that disappeared last week with nine people on board while flying over the Nasca lines, in southeastern Peru, the local police announced Monday. “We are pursuing several theories. The investigation is at an advanced stage, and we are in contact with elements of the police forces in other countries, along with Interpol,” the director-general of the Peruvian National Police, Miguel Hidalgo, told the press. “In the next few days an official finding will be made about the disappearance of the plane,” he added. The Peruvian authorities and the company that owns the Cessna plane have ruled out the possibility of an accident. “The radars detected it away from its planned route,” Peruvian defense minister Rafael Rey said Saturday in reference to press reports that have located the plane near the border with Bolivia and Brazil hours after it went missing. The initial supposition was that the plane had suffered an accident, but as the hours passed and after a fruitless aerial search, a possible act of piracy began to be suspected. The suspected kidnappers rented the plane using false identities and documents Thursday, for a tourist flight over the enigmatic pre-Inca Nasca lines, four hundred kilometers south of Lima.