Washington - A summit of leaders from the world's 20 leading economies will be held on November 15 in the US capital to tackle the ongoing financial crisis and discuss reforms to prevent a credit collapse from ever happening again, the White House announced Wednesday.

White House spokeswoman Dana Perino said President George W Bush had invited leaders from the Group of 20, a bloc that combines advanced and developing economies, to discuss the "underlying causes of the financial crisis and ... principles for reform." (dpa)