A child sleeps in an official reception center in Milan June 10, 2015. Some northern Italian regions have refused to take in more migrants sent from crowded official reception centers down south, and now another crisis is brewing as local authorities struggle to deal with thousands heading north under their own steam. REUTERS/Stefano Rellandini

Clothes belonging to migrants are hung out next to the Tiburtina station in Rome, June 11, 2015. REUTERS/Alessandro Bianchi

Migrants sleep on the street next to the Tiburtina station in Rome, June 11, 2015. REUTERS/Alessandro Bianchi

A policeman stands in front of a door of a train ready to go to Munich, Germany, as he blocks migrants without the proper documentation from getting on it, at Brenner railway station, Italy, May 28, 2015. REUTERS/Stefano Rellandini

Migrants sit at a bus station next to the Tiburtina station in Rome, June 11, 2015. REUTERS/Alessandro B

A child waves next to his mother as they sit on the street next to the Tiburtina station in Rome, June 11, 2015. REUTERS/Alessandro Bianchi

Dejen Asefaw (2nd L), a 24-year-old Eritrean, travels by train with his girlfriend from Bolzano to Brenner, northern Italy, May 28, 2015. REUTERS/Stefano Rellandini

A man makes a phone call in an official reception center in Milan June 10, 2015. REUTERS/Stefano

A family of migrants walk toward the Tiburtina station in Rome, June 11, 2015. Hundreds of migrants brought to Italy after being rescued at sea in recent weeks camped along the streets near Rome's Tiburtina train station and gathered in Milan's main terminal on Thursday, making a brief stop on their journey to Northern Europe. REUTERS/Alessandro Bianchi TPX IMAGES OF THE DAY

Migrants (L) sleep on the street next to the Tiburtina station in Rome, June 11, 2015. REUTERS/Alessandro Bianchi

A man walks through a group of migrants at the Tiburtina station in Rome, June 11, 2015. REUTERS/Alessandro Bianchi

A woman makes a bed in an official reception center in Milan, June 10, 2015. REUTERS/Stefano Rella

Dejen Asefaw (L), a 24-year-old Eritrean, makes a phone call as he waits at the Brenner railway station, northern Italy, May 28, 2015. REUTERS/Stefano Rellandini

A migrant sleeps on the street next to the Tiburtina station in Rome, June 11, 2015. REUTERS/Alessandro Bianchi

Clothers hang on a gymnasium climbing frame in an official reception center in Milan June 10, 2015. REUTERS/Stefano Rellandini

Women rest in a shady spot under trees next to the Tiburtina station in Rome, June 11, 2015. REUTERS/Alessandro Bianchi

Beds are set up in a gymnasium space at an official reception center in Milan June 10, 2015. REUTERS/Stefano Rellandini

A migrant waits at the Bolzano railway station, northern Italy, May 28, 2015. REUTERS/Stefano Relland

Migrants run as they cross a street next to the Tiburtina station in Rome, June 11, 2015. REUTERS/Alessandro Bianchi