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.

Italian Prime Minister Giorgia Meloni has criticized Friday's European Court of Justice (ECJ) ruling on the classification of safe countries of origin. She said the decision further restricted the already limited room for manoeuvre of governments.

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.