WASHINGTON — Global finance leaders are pledging cooperation between rich and poor nations to deal with a severe credit crisis after President Bush discussed the seriousness of the current situation.

The Group of 20 nations, which includes the world's wealthiest nations and the largest developing countries such as China, Brazil and India, issued a joint statement late Saturday night which stressed their resolve to work together to overcome the current financial turmoil.

Bush paid an unexpected visit to the group's meeting. Brazilian Finance Minister Guido Mantega said the president had stressed the seriousness of the situation and told the finance ministers he was doing all he could to involve other countries in efforts to resolve the crisis.