Hungary's foreign minister says the razor-wire fence on its border with Serbia is needed to secure the European Union's external border and will remain as long as large numbers of migrants keep trying to enter Hungary.

Minister Mr.Peter Szijjarto (photo) told The Associated Press on Wednesday that "only a physical obstacle" could help Hungary protect its border as long as migrants were able to pour into fellow EU member Greece and then make their way north.

He urged the EU to send forces to help Greece control the influx, to which Hungary would make a "massive contribution."

Mr. Szijjarto said those arriving from Serbia and applying for asylum in Hungary would be sent back to Serbia if their claims are rejected.