German Chancellor Angela Merkel says she finds "incomprehensible" comments that Turkish President Recep Tayyip Erdogan made following German Parliament's resolution labeling the killings of Armenians by Ottoman Turks a century ago "genocide."

Following last week's resolution, Erdogan said Germany should revisit its own history, invoking the Nazi Holocaust.

He also derided German lawmakers of Turkish origin who voted for the resolution, saying they should be given blood tests to prove whether they are really Turkish. Several have subsequently reported receiving threats.

Merkel on Tuesday responded that Parliament had included references to the Nazi Holocaust in its resolution, and that Germany has not only dealt with its Nazi past but feels "duty-bound" to continue to do so.

She says "I simply find the accusations... the Turkish side made incomprehensible."