"We cannot lie to the international community by carrying ghost passengers," Choquehuanca said.
WikiLeaks founder Julian Assange urged Europe on Wednesday to demonstrate its willingness to defend freedom of information, whatever the fear of political pressure from its "best ally," the United States.
His comments came in a piece co-written with the secretary general of Reporters without Borders, Christophe Deloire, for French newspaper Le Monde.
European Union states should accord Snowden their warmest welcome, their article said. If he is abandoned in the international zone of Moscow's Sheremetyevo International Airport, it will mean European countries are "abandoning their principles and part of the reason for the EU," it said.
In recent days, a number of European nations have voiced concern about reports -- based on documents apparently provided by Snowden -- that the United States has been conducting surveillance on its European allies.
France believes it would be wise to delay U.S.-EU trade talks for two weeks in light of the allegations, French government spokeswoman Najat Vallaud-Belkacem said Wednesday.
She was echoing remarks made by President Francois Hollande this week after the claims first appeared in German and British media.
Germany's Economy Minister Philipp Roesler has said the reports of spying do influence the planned talks, said his spokesman, Adrian Toschev.
But the spokesman declined to back the French call for a delay to the talks, which are scheduled to begin Monday.