EU Commissioner Janez Potocnik said the bloc does not want to "prejudge" future relations with Ukraine.

"Our aim in the negotiations is to bring Ukraine as close as possible to the European Union in as many areas as possible, while not prejudging any possible future developments in European Union-Ukraine relations," Potocnik said.

Potocnik was speaking in Strasbourg at a meeting of the European Parliament, which by contrast favors a clear membership perspective for Ukraine.

The European Parliament has urged Brussels to forge a so-called "association agreement" with Kyiv when the current EU-Ukraine Partnership and Cooperation Agreement expires this year.

The EU's newest member states all signed such association agreements with Brussels prior to receiving candidate status.

Poland has spearheaded efforts to advance Ukraine's EU membership perspectives. Many member states, however, are less keen to see Kyiv join the European bloc.

The European Parliament passed today a resolution recommending a better membership perspective for Ukraine. Such resolutions, however, are non-binding and are not likely to affect EU decisions on foreign policy and expansion.