Colombian prosecutors said this evening they will try three Irishmen under arrest in Bogota on charges of teaching bomb-making to Marxist FARC rebels.
The prosecutors submitted the case to the judge late yesterday.
"They believe there is sufficient evidence for a trial," Ms Carolina Sanchez, a spokeswoman for Colombia's public prosecutors office, said.
The Irishmen - Mr Jim Monaghan, Mr Martin McCauley and Mr Niall Connolly - were arrested here last August for allegedly teaching advanced bomb-making techniques to the Revolutionary Armed Forces of Colombia - known by the Spanish initials FARC - during a visit to the rebels' safe haven.
The three, who face up to eight years in jail, have denied the allegations and said in a paid newspaper notice last week they are being framed in an attempt to damage Colombia's fragile three-year old peace talks.
Mr Agustin Jimenez, president of the Committee for the Solidarity of Political Prisoners, a local lawyers group representing Connolly and McCauley, said they will appeal the prosecutor's decision.
"They are innocent. They did none of what prosecutors are saying," he said.
Under Colombian law, prosecutors had eight months from the time of the men's arrest to formally submit the case for a trial or drop the case. If a court overrules the defense's appeal, a judge will then set a trial date.
The prosecutor's evidence includes traces of explosives found on the trio's clothes and accounts by a suspected rebel defector who testified that the Irishmen had allegedly sold rocket launchers to the FARC.
The supposed defector also told prosecutors he had seen them teaching rebels to build pipe bombs and work with dynamite, according to a report published earlier this month in Cambioweekly magazine.