AMSTERDAM: Dutch authorities said on Thursday there was no sign of militant groups systematically using Europe’s asylum provisions as a way of smuggling attackers into Europe disguised as refugees.

Far-right politicians in the Netherlands and elsewhere in Europe have suggested in recent months that the hundreds of thousands of people fleeing war and poverty in the Middle East and Africa pose a national threat.

A spokeswoman for the AIVD intelligence agency said there was no evidence that militant organizations like the Islamic State were infilitrating fighters across Europe’s southern and south-eastern borders.

“There are no structural signals of refugees coming in with terrorist motives,” a spokeswoman for the AIVD intelligence agency told Reuters. “It is possible that individuals may use it (the route) but we don’t see groups coming in.”

Germany’s domestic intelligence service, however, warned on Tuesday that radicals posing as humanitarian helpers could try to recruit young refugees arriving in the country.

Dutch anti-Islamic politician Geert Wilders recently referred to the influx as an “Islamic invasion,” saying that thousands of militants were concealed among those fleeing conflict in Syria and Iraq. A poll this week showed his far-right populist Freedom Party would nearly double its seats, from 12 to 29 in the 150-member parliament, if elections were held now.