Police arrested the Austrian suspect, a 17-year-old with Albanian roots, after tip-offs.
Figures have risen since the 2015 annual survey.
The minors are worried that transfers to the U.K. have ceased.
The State Department says ISIS and Al-Qaeda are still planning attacks on European soil.
'None of us want to be sleeping on the street or under the train tracks,' a refugee says. "I can do any kind of work here. I just want to start.'
The operation targeted 2,500 migrants sleeping rough near Paris's Stalingrad metro station.
Orthodox church is one of the few structures still standing in the sprawling camp, which is being demolished.
France is demolishing the "Jungle," and refugees still don't know whether they'll end up in Britain or France.
A man who posted a photo with the flag on Facebook will not be charged.
'The public discourse on the migrant issue has crossed the line into hate speech.'
Turnout for the vote was lower than the 50 percent threshold for a binding referendum.
War of words erupts ahead of a referendum on refugees in the Eastern European state.
UNICEF says nearly 50 million children around the world are displaced.