Moving to the Greek-Macedonian border, where thousands of migrants are stuck in Idomeni, unable to go forward as Macedonia's border remains closed, but unwilling to leave.

They have been protesting and demanding for the frontier to open so they can go on to northern and western Europe. Some have even tried tearing down the barbed wire fence. More than 12,000 migrants and refugees have been stranded in Idomeni since February.

In early March, Macedonia closed its border to transiting migrants, effectively closing what's called the Balkan route, after entry restrictions were imposed by Slovenia, Croatia and Serbia.