European Central Bank chief Mario Draghi on Thursday voiced concern over the recent strength of the euro, which is putting the brakes on inflation at a time when policymakers are looking to wind down stimulus measures.

"The recent volatility in the exchange rate represents a source of uncertainty which requires monitoring with regard to its possible implications for the medium-term outlook for price stability," Draghi said at a press conference.

The euro has risen by more than 10 percent against the greenback this year, currently hovering near $1.20.