BOGOTA, Colombia (CNN) -- A Colombian prosecutor called Thursday for an investigation into 12 people for alleged ties to a leftist rebel group.
The allegations were based on material taken from computers seized by Colombian military forces after a March raid on a Revolutionary Armed Forces of Colombia camp that killed its leader, Raul Reyes, said public prosecutor Mario Iguaran.
"There are indications, after the analysis and the report from the judicial police, of presumed ties with FARC to three Colombian members of Congress and four foreigners," he said.
Iguaran identified the lawmakers as Piedad Cordoba, Wilson Alfonso Borja and Gloria Ines Ramirez.
"Senator Piedad Cordoba said that she would only give explanations to the magistrates of the court who require it," he said.
Cordoba said the assertion was part of a government plot.
"We are very conscious of what it signifies," she said. "They have sought people whom they are investigating for belonging to FARC in order to pressure them to say that we too belong to FARC."
Wilson Borja and Gloria Ines Ramirez said that the claim represents a reprisal for their criticism of the relationship between politicians close to the government and Colombia's right-wing paramilitary groups.
Also to be investigated are former presidential candidate Alvaro Leyva, former peace adviser Lazaro Viveros, Liliana Patricia Obando and journalists William Parra and Carlos Lozano.
"If I appear mentioned it must be always as a function of the humanitarian and peace agreement, in contribution with [Venezuelan President Hugo] Chavez and Piedad Cordoba and with Dr. Alvaro Leyva," Lozano said.
"The commission called me two weeks ago about that. About it, I see no significance. I am at peace."
Among the non-Colombians cited by Iguaran are a Venezuelan, two Ecuadorans and an American college professor.
The call for an investigation came a week after Interpol reported that the contents of computers found in a rebel camp in Ecuador had not been tampered with.
CNN's Fernando Ramos contributed to this story.