Thousands of refugees have been crossing into Croatia on a daily basis, in search of alternative routes to Western Europe after Hungary had sealed its border with Serbia.
According to Vuciс, Croatia's has offered no explanation for its decision, which had been made unilaterally, leading him to believe that it was an attempt to "annihilate the Serbian economy."
"I have requested clarifications, explanations, and have asked for understanding. I have asked the European Union to intervene because we have not been taking action for three or four days already," Vucic told reporters.
Vucic said he had addressed his letter to European Council President Donald Tusk, European Parliament President Martin Schulz, EU foreign policy chief Federica Mogherini and Commissioner for European Neighborhood Policy Johannes Hahn.
In recent months, Europe has been facing an enormous influx of migrants fleeing war and poverty in the Middle East and North Africa. Over half a million refugees have arrived in the European Union so far this year, according to European Commission estimates.
On Wednesday, Serbian Ambassador to Russia Slavenko Terzic said that Belgrade was planning to adopt countermeasures should the Croatian border crossings with Serbia remain closed.