SOFIA, Oct. 24 (Xinhua) -- The prime ministers of Bulgaria, Serbia and Romania jointly announced here on Saturday that they will not allow their countries to become a buffer zone for refugees.

If Germany, Austria and other countries close their borders, the three Balkan countries will not agree to become a buffer zone for refugee flows located between Turkey and fences that will follow after Serbia, Bulgarian Prime Minister Boyko Borissov told a joint press conference.

"We will be ready in the same way to close our borders at the same moment," Borissov announced the joint position of the three countries, which will be expressed on Sunday at an EU special summit on tackling migration that will be held in Brussels.

"We will not put our countries on the devastating pressures of millions who would come," Borissov said.

The intensive building of fences in Europe worried Bulgaria, Serbia and Romania, and the three countries were worried about how far the refugee wave would reach, Borissov said.