AKIPRESS.COM - A UN refugee agency field officer says a large number of families with small children have been among the thousands of migrants crossing along a muddy border passage between Serbia and Croatia.

Niklas Stoerup Agerup, field protection officer for the United Nations High Commissioner for Refugees, said Thursday that some 1,000 people have passed through the border area overnight, reports ABC News.

Stoerup Agerup says that around 60 percent of the people passing through are in families, and "maybe 45 percent of them have been children under the age of 5." He adds that "it is a tendency that we have been seeing over the last couple of weeks."

Croatian police say some 1,300 migrants have crossed the border since midnight Wednesday.