"Europe is extremely sick and must start dealing with its problems extremely quickly, or else there may be an accident," Deutsche Bank’s David Folkerts-Landau said, according to the newspaper. "I’m no doomsday prophet, I am a realist."

With Italian banks weighed down by 360 billion euros of soured loans, the government has been sounding out regulators on ways to shore up lenders amid a renewed selloff after Britain voted to leave the European Union. Lorenzo Bini Smaghi, a former member of the European Central Bank’s executive board who now chairs Societe Generale SA, said Wednesday that Italy’s banking crisis could spread to the rest of Europe and rules limiting state aid to lenders should be reconsidered to prevent greater upheaval.

"I do not expect a second financial crisis like in 2008," Folkerts-Landau said, according to Welt. "The banks are much more stable today and have more equity. What we face this time is a slow, long downward spiral."