Border checks by Austria that have caused long queues on the Hungarian side of the frontier in recent days are unjustified, Péter Szijjártó, minister of Foreign Affairs and Trade, has said.
Minister Szijjártó said controls were needed on Hungary's Serbian and Croatian borders but not where it meets Austria, Reuters reports.
He added that Hungary was doing its job to defend the external border of the passport-free Schengen zone to the south.
"I think what the Austrians are doing on the Hungarian-Austrian border is unjustified," he told a news conference.
Austrian border checks on lorries heading from Hungary towards western Europe have caused long queues this week. Hungarian police have responded with traffic safety checks on the Hungarian side.