Croatia's delegation, led by Prime Minister Ivo Sanader, also included Foreign Affairs and European Integration Minister Kolinda Grabar-Kitarovic and the country's chief negotiator with the European Union, Vladimir Drobnjak.
The Union was represented by foreign ministers of 25 EU member-states.
As soon as the conference ends, Sanader and Jack Straw, Foreign Secretary of Great Britain that chairs the EU, are expected to hold a news conference.