Poland's defense minister says his country plans to buy U.S. missiles for their F-16 fighter jets and hopes the deal will be completed this fall.

The plan comes as Poland intensifies efforts to modernize its military given the Russian aggression in Ukraine, something that has added to feelings of insecurity in Eastern Europe.

Tomasz Siemoniak said Tuesday that missiles for the F-16s are "one of the most modern weapons in the world at the moment. We really want to have them."

He said he hopes the deal can be finalized in October or November. It would then take up to two years for them to be delivered.

The deal must still be approved by the U.S. Congress.