​​​​​​​​​​​​​WASHINGTON

The US State Department approved the possible sale of advanced medium-range air-to-air missiles and related elements and program support to Poland, the Pentagon said Tuesday.

The estimated cost is $1.33 billion.

"The proposed sale will improve Poland’s capability to meet current and future threats by providing air-to-air defense to protect Polish and allied forces in transition or combat and significantly improve the Polish contribution to NATO requirements," it said in a statement.

The principal contractor for the sale will be RTX Corp in Tucson, Arizona.

The Defense Security Cooperation Agency delivered the required certification notifying Congress of the possible sale on Tuesday.