Alarm is sounding in at least six countries in Europe amid the waves of sexual assaults on women by hordes of Muslim migrants, an unexpected phenomenon that has caught European governments flat-footed.

The sexual assaults were initially reported in Cologne, Germany, on New Year's Eve. Similar attacks happened in other German cities such as Bielefeld, Duesseldorf, Frankfurt, Hamburg and Stuttgart, reports said.

Authorities said more than 100 incidents of sexual assaults and robberies involving Arab and North African migrants and victimising local women were recorded in Cologne alone, according to WND.

Five other European countries reported similar attacks—Austria, Finland, France, Sweden and Switzerland.

In Austria, police allegedly tried to cover up evidence of sex attacks in Vienna, Breitbart London reported on Friday.

In Finland, police told Agence-France Presse there was "widespread sexual harassment" at a New Year's Eve event involving about 1,000 migrants.

In France, two Afghan migrants were arrested after they attempted to rape passengers on a train in Paris, Le Parisien reported on Thursday.

In Sweden, at least nine women were molested by gangs of migrants in Kalmar.

In Switzerland, six women said were sexually harassed at a New Year's Eve event in Zurich, SWI reported on Thursday.

Commenting on the migrants' attacks, Slovakian Prime Minister Robert Fico declared that "the idea of multicultural Europe has failed," the Telegraph reported on Friday. "The migrants cannot be integrated; it's simply impossible," Fico said.

Finnish authorities agreed with their German counterparts that the crime waves sweeping their countries were brought about by the arrival of refugees.

"There hasn't been this kind of harassment on previous New Year's Eves or other occasions for that matter. This is a completely new phenomenon in Helsinki," Ilkka Koskimaki, the city's deputy police chief, told AFP.

Gunnar Norgren, a police officer in Kalmar, Sweden, made a similar assessment. "We have not really had this phenomenon before. Had it been a single report, someone being groped on the dance floor, then yes, they've happened, naturally. But ... this is something new," Norgren said.

The alarms being sounded in Europe are reverberating in the United States. Terrorism expert Brigitte Gabriel told WND and Radio America on Friday that Europe's crisis shows a glimpse of what would happen in the U.S. if it follows German Chancellor Angela Merkel's embrace of the Muslim migrants. Germany is now home to 1.1 million migrants from the Middle East and North Africa.

"This is a preview as to what's coming into our own nation in the United States, once we start bringing and importing these refugees," Gabriel said.

"Remember, these refugees are coming from societies that have no respect for women," she said. "They treat women as property. They treat women as a subject to be used and abused. Men abuse their wives, beat their wives, rape their wives."

Gabriel pointed out that in Islamic countries, "there is no such thing as rape because the Quran gives the right to a man to do whatever he wants to his wife because she is his property."

"What we are seeing in Europe is the importation of a culture that is completely opposed to everything we stand for and believe in," she said, adding that the Muslim refugees looked at foreign women as something to be used, "especially if they are infidel women."