The World Bank Group and International Monetary Fund are preparing financing support for Ukraine.
In a joint statement, leaders of the two agencies said they were worried by the potential spillover effects of the Russian invasion.
They cited rising commodity prices, disruptions in financial markets and the risk of further fuelling global inflation.
The World Bank said it would pledge $3bn (£2.3bn) in the coming months, including at least $350m in the next week.
The IMF meanwhile said it will swiftly consider Ukraine’s request for emergency financing. It also hopes to make $2.2bn in funding available up to June.