De Cos said on Wednesday that a gradual withdrawal of the extraordinary monetary stimulus was adequate in the current situation when there are upside risks to inflation projections and core inflation is "clearly" above intermediate-term and medium-term inflation expectations of around 2%.

"In the coming quarters, further (rate) increases could be made to reach levels in line with the natural rate of interest if the medium-term inflation outlook remains around our target," De Cos said, adding that at this particularly uncertain time, the process of raising interest rates should be gradual.

(Reporting by Jesús Aguado; additional reporting by Emma Pinedo; editing by Balazs Koranyi and Andrei Khalip)