Spain has demanded an explanation from Venezuela over claims that it assisted two rebel groups which plotted to kill Colombia’s President Alvaro Uribe.
Spanish PM Jose Luis Rodriguez Zapatero said that Madrid would “act in accordance with that explanation”.
Earlier, a Spanish judge charged six suspected members of Basque separatist group Eta and seven alleged Colombian Farc rebels with various offences.
He said he believed Farc had asked for Eta’s help in a plot to kill Mr Uribe.
The Venezuelan government has not publicly commented on allegations it was involved.