Speaking to reporters in Vienna, Nowotny added that the ECB had no exchange rate target so it would monitor the developments.

The euro has gained 4 percent against the dollar in the past three months and now trades 4.5 percent above the level used in the ECB's December macroeconomic projections.

(Reporting by Shadia Nasralla; Writing by Balazs Koranyi; Editing by Toby Chopra)