"There is no democracy within that organisation (UN). It continues to rule with the right to veto as in the Middle Ages and cannot build democracy," ANA said in a statement delivered to the media in Pristina.
A former UNMIK chief, Michael Steiner, branded ANA a terrorist organisation.
"We will fight against any enemy or traitor to the full victory, the uniting of the Albanian nation, with the motto -- one nation, one state," read the statement.
ANA claimed responsibility for a number of armed attacks in Kosovo and the region in recent years.