PARIS, Dec 13 - Dozens of countries and international organizations threw their weight and more than 1 billion euros (dollars) in aid pledges behind an urgent new push Tuesday to keep Ukrainians powered, fed, warmed and moving as winter approaches.

An international donor conference in Paris quickly racked up substantial promises of financial and in-kind support, a defiant response to sustained Russian aerial bombardment of critical infrastructure that has plunged millions of Ukrainian civilians into deepening cold and dark, The Associated Press reported.