HELSINKI, May 8 (Xinhua) -- The euro zone has been caught in the worst crisis in its history as debt-ravaged Greece has plunged the financial market and the euro into an uncertain situation, Prime Minister Matti Vanhanen said Saturday.

The debt crisis has affected the whole euro zone on the system level, Vanhanen said in an interview with Finnish Broadcasting Company. adding that no countries are safe if a domino effect began.

Finance Minister Jyrki Katainen on Saturday called on European banks that offered loans to Greece at a high interest rate to lower the rate voluntarily.

A survey released by the Finnish newspaper Helsingin Sanomat on Saturday showed that nearly half of Finns are willing to support other euro zone countries in difficulties.