"Hungary may have thousands of kilometres of fence on the border, but warthogs, chickens, wild boars, people and really anyone who wants to can cross it," he added.

The reply from the Hungarian government came from the Prime Minister’s political director Balázs Orbán, who said "The Croatian president says the Hungarian border fence is not suitable for stopping illegal immigration. I suggest that President Milanovic try to cross the Hungarian border illegally from Serbia, and then we can talk about the effectiveness of the fence".