Greece will need a year to provide adequate shelter for 2,200 unaccompanied migrant children, the country's migration minister said on Tuesday.

Yannis Mouzalas said there were now no more than 25 minors held in Greek police stations and 1,000 hosted in specialised facilities.

But most of the unaccompanied migrant children, some 1,200, are still staying in camps scattered across Greek islands in the eastern Aegean sea.