The United States and Poland have agreed on a missile defense deal, and according to the Associated Press Russia is “infuriated.”

WARSAW, Poland – Poland and the United States reached an agreement Thursday that will see a battery of American missiles established inside Poland, a plan that has infuriated Russia and raised the specter of an escalation of tension with the region’s communist-era master.

The deal, which was to be signed later Thursday in Warsaw by Poland and the United States, includes what Polish Prime Minister Donald Tusk called a “mutual commitment” between the two nations — beyond that of NATO — to come to each other’s assistance in case of danger.