Molterer said the talks focused on possible investments that would be supported by EFSI.
He would not comment on the current political situation in Croatia.
Attending the talks between Oreskovic and Molterer were also Anton Kovacev of the European Investment Bank (EIB) Office and Branko Baricevic, head of the European Commission Representation in Croatia.
EFSI was launched jointly by the EIB, the European Investment Fund and the European Commission to help EU member states finance strategic investments with private and public money.
EFSI is one of the three pillars of the EUR 315 billion Investment Plan for Europe, put forward by EC President Jean-Claude Juncker in an attempt to revive investments in strategic projects across Europe and make sure money is invested in the real sector.