The European Commission has warned about the threat against unaccompanied refugee children, who are falling to pray to human trafficking on their journey to European countries.

According the European Commission’s report that was published on Thursday, between 2013 and 2014, a total of 15,846 men, women and children were documented as victims of human trafficking in the EU.

The report underlines that the primary reason for human trafficking is sexual exploitation (67%), followed by forced labor (21%). Over three quarters of trafficking victims are women, while about 15% are children. Two thirds of trafficking victims have European citizenship.

About 96,000 unaccompanied children filed for asylum in 2015, which is about one fifth of the total number of refugee children. The European Commission report notes that about 10,000 of these unaccompanied children have seemingly disappeared.

The full report is available online.