"[Some] migrants travel along the Nordic route across Russia to enter the Schengen zone via Norway or Finland. More than 2,000 migrants attempted to enter the Schengen area using this route in 2015," the report read.
According to the report, almost the same number of entries were recorded on the so-called Eastern route, along the European Union’s external border with Belarus, Moldova, Ukraine and Russia with most migrants of Afghan, Vietnamese, or Syrian nationality.
The law enforcement agencies say that a total of 7,164 illegal border crossings mainly by Guinean, Algerian and Moroccan nationals were detected on the Western Mediterranean route in 2015, which crosses Spain and Portugal.
A a total of 153,946 illegal entries were detected on the Central Mediterranean route, which is predominantly used by African migrants, trying to reach the Italian shores, the report reads.
The biggest number of entries were recorded along the South-Eastern route with 885,386 migrants coming to Greece or Bulgaria from Turkey in 2015.
The authors of the report come to the conclusion that travel by 90 percent of the migrants coming to the European Union is predominantly facilitated by members of a criminal network.
