"This proposed sale will support the foreign policy and national security of the United States by improving the security of a NATO ally that is a force for political and economic stability in Europe," the US Defense Security Cooperation Agency (DSCA) said in a statement.

The State Department approved the possible sale to Poland and the DSCA provided the required notification to the US Congress, which still needs to sign off on the transaction.

Poland has been a key partner of Ukraine since Russia launched its full-scale invasion of that country in February 2022.

Fearing threats from Russia, Poland has for several years rapidly modernized its military, signing a string of arms contracts, mainly with the United States and South Korea.

It has already earmarked 4.7 percent of its GDP for military expenditure this year, and next year it aims to raise it further.