Greece has moved up on the rankings of Transparency International's annual Corruption Perception Index in 2015, but it still lies on 58th place out of 168 countries included in the report.
In a letter sent Monday, Juncker backed Slovenia's proposal for EU support to reinforce the FYROM border with Greece to stem the northward flow of migrants. Under this plan, most migrants who got to Greece would stay in place, taking pressure off transfer countries but eventually also from Austria and Germany.
A search was underway for around 20 people listed as missing after the latest tragedy involving migrant boats crossing the Aegean Sea from Turkey to Greece.