The International Monetary Fund said on Tuesday it stands ready to help sub-Saharan Africa’s oil exporters cope with plunging crude prices and growing fiscal pressures but has not received any new funding requests from the region.

Nigeria and Angola instead have turned to the World Bank for assistance, even though the IMF is typically viewed as the world’s go-to crisis lender.

Facing an estimated $15 billion budget deficit in 2016, Nigeria’s finance ministry has said it is looking to borrow as much as $5 billion. It has held discussions with the World Bank, African Development Bank and China’s Export-Import Bank due to their “concessionary rates of interest.”

The World Bank is discussing potential financing for Nigeria and Angola through a program to support structural changes in an emerging market country’s economy and government institutions.

The two sub-saharan African countries are the latest in what may become a long line of oil-exporting countries to seek financial assistance to help stem growing deficits as falling crude prices crush revenues. The IMF and World Bank are already talking to Azerbaijan about a $4 billion financing package.

On Tuesday, U.S. crude fell back below $30 a barrel, half its price in June 2015 and down from about $100 two years ago.

“The sharp decline in oil prices represents a formidable shock on the oil exporting countries of sub-Saharan Africa, especially in view of their strong reliance on oil receipts for fiscal and external revenues,” an IMF spokeswoman said in a statement.

The IMF noted that despite rising deficits, several of these countries still have adequate foreign exchange reserves and low levels of overall debt. This would suggest that a balance-of-payments crisis is not imminent.

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