Draghi and other world financial leaders were attending a dinner in Washington on Thursday evening to discuss the global economy.

In an apparent reference to a story on Bloomberg from Oct 4 on a consensus building in the ECB on tapering quantitative easing, Draghi told the G20 dinner it would be a mistake to speculate about tightening of monetary policy, the G20 source said.

Draghi also sought to reassure the G20 that no new banking crisis was brewing in Europe and that there was no problem with solvency in the European banking sector.

He noted that banks' capital adequacy ratios were more than satisfactory, but that bank profitability was a problem, the G20 official said.

(Reporting By Jan Strupczewski)