French Prime Minister Manuel Valls attends the questions to the government session at the National Assembly in Paris, France.

Some of the suspects in the Paris attacks took advantage of Europe’s migrant crisis to “slip in” unnoticed, the French premier said on Thursday, warning the EU needed to “take responsibility” over border controls.

Manuel Valls said the EU’s cherished passport-free Schengen zone would be in danger if the bloc did not improve border controls, after it emerged the ringleader of the Paris attacks had managed to enter Europe unnoticed.

It was confirmed on Thursday that Abdelhamid Abaaoud, a Belgian of Moroccan origin linked to a series of extremist plots in Europe over the past two years, had died in a police raid on an apartment in northern Paris on Wednesday.

As debate raged about the failings that had let Abaaoud slip through the net, Valls urged France’s neighbours to “play their role properly”, saying the whole Schengen system would be “called into question… if Europe does not take responsibility” for its borders.

The Schengen system allows passport-free travel between 26 countries but it has come under severe strain this year as the continent struggles with its biggest migration crisis since World War II.

More than 800,000 migrants and refugees have arrived this year and Valls said some of the Paris attackers had turned the chaos to their advantage.

“These individuals took advantage of the refugee crisis… of the chaos, perhaps, for some of them to slip in” to France, he said on the France 2 television station.

“Others were in Belgium already. And others, I must remind you, were in France.”

Related articles across the web

• Picasso painting found in New Jersey back in Paris museum
• Contre-espace by Pascal Grasso
• Nightmarishly Bizarre Reimagining of THE SIMPSONS Intro
• Prime minister says France would support regional troops in Syria
• Dove Cameron Takes 'Descendants' To Paris!
• France willing to pay 80 mn euros for Rembrandt painting: minister
• Ml 2.6 France
• You are a marvel
• French Regulator Rejects Google Appeal on 'Right to Be Forgotten'
• French Regulator Rejects Google Appeal on 'Right to Be Forgotten'