The Court of Justice of the European Union was asked to weigh in on whether Italy's accelerated asylum process — used to swiftly return migrants from countries not experiencing war or major crises — complies with EU law.

Europe's top court on Friday questioned the legitimacy of the "safe countries" list Italy uses to send migrants to Albania to await decisions on their asylum claims, in a fresh blow to a key aspect of the government's migration policy.

While ruling Italy's plan to fast-track migrant deportations is legal, the European Court of Justice set out some limits. Those include disclosing sources for their assessment of a country being considered "safe.