Spain has said that it was ready to apologise to Bolivia over any “misunderstanding” that may have taken place relating to an incident last week where Bolivian President Evo Morales’ plane was diverted and grounded in Vienna for 13 hours on suspicions that fugitive U.S. spy agency contractor Edward Snowden was aboard.

Garcia-Margallo’s statement represented a change in Spain’s position from last week where the foreign minister had said Madrid had no reason to apologise because its airspace was never closed to the Bolivian president’s plane.

Morales’ government plane took off from Vienna on Wednesday after an unscheduled overnight stop, an airport spokesman said without giving more details.

The plane was forced to land in Austria after France and Portugal abruptly cancelled air permits for it while en route from Moscow on Tuesday, apparently due to fears fugitive ex-U.S. spy agency contractor Edward Snowden could be on board.

Bolivian and Austrian officials denied this.

No unauthorised people were found on board the plane when Austrian authorities carried out a voluntary inspection, Deputy Chancellor Michael Spindelegger said on Wednesday.