Huge numbers of people surged into Croatia after Hungary erected a barbed wire-fence and took other tough measures to stop them from using it as a gateway into Western Europe.
Croatia represents a longer and more difficult route into Europe, but those fleeing violence in their homelands had little choice.
Many of the migrants are Syrians and Iraqis fleeing war, who are seeking safety and prosperity in Germany and elsewhere in Western Europe.
"We will not pay the price of someone else's incapability," Vulin said. "I am sorry to see that Croatian humanity and solidarity lasted just two days."
However, despite the border closures, many continued entering Croatia through cornfields. Women carrying children and people in wheelchairs were among the thousands rushing in the heat in hopes of finding refuge.
People were scrambling to board local buses, without knowing where they are going.
Hungary's Prime Minister Viktor Orban says that his country has started building a razor-wire fence along a stretch of its border with Croatia to keep migrants from entering the country there.
The migrants would prefer the quicker route to Europe through Hungary, instead of taking the longer route to Western Europe through Slovenia.
Meanwhile, Slovenia has been returning migrants to Croatia and has stopped all rail traffic between the two countries. Slovenian police have intercepted dozens of migrants who tried to cross through the forests overnight into the country from Croatia and will be returned there.
As the sun rose on Friday, refugees from Syria, Iraq and Afghanistan woke up to a new day with no hope in sight.
