European Central Bank (ECB) Executive Board member Benoit Coeure said in an interview with Politico published on the central bank's website on Wednesday that negative interest rates were not the central bank's main monetary policy tool.

"Negative interest rates are not our main instrument, they just support our overall policy," he said.

Coere pointed out that the ECB would not cut interest rates "into absurdly negative territory", adding that further actions were possible.

He noted that the central bank did not discuss the introducing of "helicopter money".