"There is full cooperation" between Spain and Venezuela in the case of people "presumably" linked with the armed Basque separatist group ETA, Minister of Foreign Affairs Nicolás Maduro said Friday in Lisbon.

Such cooperation will be always carried out "within the framework of international law," Maduro added. The Venezuelan Foreign Minister paid a brief visit to Lisbon for talks with his Portuguese counterpart, Luis Amado, Efe reported.

"Whenever someone (related to Venezuela) has been requested, we have been at the service (of the petitioner) and we will continue doing so by fulfilling the principles of international law," Maduro said in the Portuguese capital.

The Venezuelan Minister referred to the recent arrest of ETA suspect Andoni Zengotitabengoa in Lisbon airport, when he tried to fly to Caracas. "The Spanish government alerted the Venezuelan authorities that another alleged ETA member might be on the same flight" and Venezuela immediately took the necessary steps.

On the international arrest warrant against Arturo Cubillas, a Spaniard with Venezuelan citizenship, due to his alleged activities related to ETA, Maduro said that the Venezuelan judicial system "has asked for more data on this request."