(Bloomberg) —Poland’s government agreed to buy the Patriot missile defense system from the U.S., Polish state news agency PAP reported on Wednesday as President Donald Trump started his 16-hour visit to Warsaw.

In March, Polish Defense Minister Antoni Macierewicz said he planned to sign a contract, valued at less than 30 billion zloty ($8 billion), with Patriot producer Raytheon Co. by the end of the year. The first deliveries of the missile interceptors, which have been a source of tension between NATO and Russia, may take place within two years, he said then.

Poland, a formerly communist nation that shares a border with Russia, is one of the few NATO members that meet the alliance’s defense-spending target of 2 percent of economic output. Trump will meet his Polish counterpart Andrzej Duda in Warsaw on Thursday to discuss military and energy security before traveling to Germany for a meeting of the G-20 industrialized nations.

PAP didn’t reveal the source of its information, but said that Poland’s Defense Ministry will hold a news conference on Thursday about the deal with the U.S. Department of Defense.