(ANSA) - BELGRADE, FEB 19 - According to a European source, the President of the European Council, Antonio Costa, has increased contacts with the leaders of the 27 member states and initiated a process of "bilateral consultations" on two key issues: "what they are willing to do in terms of aid to Ukraine and their positions on security guarantees." The initiative was announced "last night" to the Permanent Representatives Committee. (ANSA).