The thorny issue of migration will dominate a summit of EU leaders Thursday with divisions rife between the bloc’s 28 members over how they should tackle the crisis.

The European Council, the EU’s decision-making body that is hosting leaders in Brussels, says that it is “intensifying efforts to establish an effective, humanitarian and safe European migration policy.”

But countries like Greece and Italy that are at the forefront of the migration crisis — with both nations receiving thousands of migrants attempting to reach Europe by sea — feel that other European countries are not pulling their weight.

Some, like those in Eastern Europe, have refused point-blank to cooperate with existing EU policies that are aimed at alleviating migratory pressures on the bloc’s southern members.