The EU has protested Moscow's refusal to allow a member of the European Parliament to enter Russia after declaring her persona non grata.
A spokesperson of the EU External Action Service, the EU's diplomatic and foreign service corps, told RFE/RL that it condemned Moscow airport officials' denial of entry to Rebecca Harms on September 25.
The source said Harms had checked her status with Russian authorities before making her trip.
Harms, a German citizen, said she was only told in Moscow that she was persona non grata.
Harms flew to Moscow to attend the court appeal of Ukrainian helicopter pilot Nadiya Savchenko, whose hearing was then postponed until October 13.
The EU said the "lack of transparency" by Russian authorities with regard to people blacklisted from Russia was "regrettable" and went against the spirit of the EU-Russian Visa Facilitation Agreement.
With reporting by dpa