Warsaw hosted negotiations between groups of Russian and Polish experts led by the two countries' deputy foreign ministers, Russia's Sergei Kislyak and Poland's Witold Waszczykowski.
"These were very interesting talks held in a favorable atmosphere," Stanislaw Komorowski, Poland's deputy defense minister, said.
He added that the parties had exchanged opinions and discussed problems that could arise from the deployment or rejection of the missile defense project.
Earlier on Thursday, Czech Prime Minister Mirek Topolanek held a meeting with his Polish counterpart Donald Tusk in Prague. The Czech official said his government would submit to parliament in April a missile defense bill that includes the placement of a U.S. radar on the country's territory.
Tusk, who took office in November last year and has a more cautious approach to the U.S. proposal than his predecessor Jaroslaw Kaczynski, said Poland and the Czech Republic would coordinate their activities concerning missile defense negotiations with the U.S.
Washington wants to place 10 missile interceptors in Poland and a radar in the neighboring Czech Republic, purportedly to counter a missile threat from Iran and other "rogue" states.
Moscow fiercely opposes the U.S. plans, saying the European shield would destroy the strategic balance of forces and threaten Russia's national interests.
