VIENNA, Austria (AP) -- A European Union official is warning that Europe has a hidden labor market in which migrant workers and even children are working in "slave-like" situations.
Morten Kjaerum, the head of the EU Agency for Fundamental Rights, says he fears the global economic crisis could push more people into this underground economy and expose them to severe exploitation.
Kjaerum also says hundreds, if not thousands, of children come to Europe each year and simply disappear within days or weeks.
Kjaerum made his remarks Tuesday during an interview with The Associated Press.
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