Source: 'Mainstream civil society is radicalising because the majority don't want migration'

Officials fear integration is impossible as so many live in isolated societies

Germany's intelligence agencies have expressed serious concerns over the huge influx of migrants harbouring extremist views, it has been reported.

A security document has warned of the damaging consequences of Berlin's open-door policy which is expected to see around one million refugees enter the country this year alone.

It read: 'We are importing Islamic extremism, Arab anti-Semitism, national and ethnic conflicts of other peoples as well as a different societal and legal understanding.'

Security sources also fear the integration of migrants 'is no longer possible' because so many already live in isolated communities.

Migrants wait at the central registration centre in Berlin. Germany's security services have expressed concern that the country is 'importing' Islamic extremism by allowing so many refugees into the country

The document, seen by German newspaper Welt am Sonntag, added: 'German security agencies... will not be in the position to solve these imported security problems and thereby the arising reactions from Germany's population.'

A senior level security official also told the paper that 'the high influx of people from all parts of the world will lead to instability in our land', it was reported by The Jerusalem Post.

The official added: 'Mainstream civil society is radicalising because the majority don't want migration and they are being forced by the political elite.'

The concerns have been voiced by the four major security agencies in Germany – the Federal Office for the Protection of the Constitution, the Federal Intelligence Service, the Federal Police and Federal Criminal Police Office.

Germany – which is braced for around one million asylum seekers this year – has seen a spike in violence at registration centres in recent weeks as conditions deteriorate and tempers boil over.

Over the weekend, police sprayed left-wing protesters with a water cannon to keep them apart from an anti-Islam demonstration by a far-right group in western Germany.

Supporters of the Pegida movement - an acronym for 'Patriotic Europeans Against the Islamification of the West' - hold a rally in Dresden last week. Tensions have risen dramatically in recent months after Germany agreed to accept around one million refugees this year

Some 3,500 police in full riot gear were in Cologne yesterday afternoon, sometimes stepping in to keep the two groups from fighting.

About 10,000 people - including many families waving signs reading 'refugees welcome' - were protesting the demonstration Sunday by 1,000 from a group called 'Hooligans against Salafists,' the dpa news agency reported.

The more-radical offshoot of Dresden's anti-Islam PEGIDA group had clashed with counter-protesters last year in Cologne, injuring dozens. Police have stepped up measures this year to try and prevent similar violence.

Sex attacks are also now said to be an everyday event while in one state alone there are understood to have been 100 cases of violence in just the last three months.

Some women are even reportedly being forced to become €10-a-day prostitutes, local media reported.

More than 670,000 people have reached European soil this year - many of them fleeing violence in Syria, Iraq and Afghanistan - in the continent's worst migration crisis since World War II.

Slovenia's premier this weekend warned the European Union that it 'is weeks away from falling apart' if the bloc cannot agree on a plan to confront the sudden influx of refugees through the Balkans.

Nine days after Hungary's move to seal its southern border drove unprecedented migrant flows into tiny Slovenia, Prime Minister Miro Cerar sent out a dramatic call to fellow central and eastern leaders in Brussels for emergency talks.

He said: 'If we don't find a solution today, if we don't do everything we can today, then it is the end of the European Union as such. If we don't deliver concrete action, I believe Europe will start falling apart.'

Since October 17, more than 62,000 migrants have arrived in Slovenia, with some 14,000 still passing through the country on today alone.