Pro-Russia separatists barricaded the entrance to the Kramatorsk airbase in eastern Ukraine as they faced off with Ukrainian guards.
Ukraine's acting president Oleksander Turchinov said the airfield has now been retaken from the pro-Russia separatists.
Tensions remain high in eastern Ukraine after at least three died in a day of shooting during what was supposed to be an Easter truce.
In an exclusive interview with NBC News, the Ukrainian Prime Minister warns of the dangers of unchecked Russian expansion and aggression.
Russia, the US and the EU say that all sides have agreed to steps to "de-escalate" the crisis in Ukraine at talks in Geneva.