The interruption of talks between Greece and international lenders on a new aid tranche is a blow to the stability of Europe's currency, the deputy leader of Germany's junior coalition partners said on Saturday.

Christian Lindner, general secretary of the Free Democrats, (FDP) junior coalition partners in Chancellor Angela Merkel's center-right government, said Athens was endangering European solidarity.

The breakdown of talks between the Troika and Greece is a blow to the stability of the euro, he said at a news conference in Berlin.

Referring to Greece's failure to meet deficit targets set in exchange for a second bailout package, Lindner said Athens was shirking responsibilities to which it had agreed.

This is not about non-binding statements of intent, but contractually secured reciprocity for the emergency loans, he said. We insist these agreements are observed.

Talks between Greece and the EU, IMF and ECB were put on hold on Friday after disagreement over why Athens has fallen behind schedule in cutting its budget deficit and what it must do to catch up.

The unplanned early departure of senior inspectors from the three bodies showed tension between Athens and its lenders over reforms, as clouds gathered over the second bailout package aiming to pull the country out of a severe debt crisis.

The pro-business FDP styles itself as a defender of the German taxpayer, a stance Lindner reiterated in his statement over Greece.

Taxpayers in Northern Europe and especially Germany cannot accept inability or reluctance. In the eyes of the FDP, Greece must reaffirm it will for stability and reform.

Mediation or postponements are no longer acceptable for us. The heads of the IMF and euro countries should therefore travel to Athens immediately to obtain binding declarations toward the fulfillment of the agreed goals.

(Reporting by Brian Rohan)