In comments aired on the Rossiya television channel, Ivanov said placing rockets in Poland and a radar station in the Czech Republic "presents an obvious threat to Russia."
Russia has continually voiced its opposition to the U.S. missile-defense system that Washington says is meant to offer protection against attacks from Iran and North Korea.
Washington's plans for the missile shield have led to a further deterioration of already unsteady relations between Russia and the United States in recent months.
Russia has proposed creating a joint missile-defense system with United States and NATO participation as an alternative to Washington's current plan, but U.S. officials have treated the proposal cautiously.
Moscow And Washington: Toe To Toe
U.S. President George W. Bush (left) and Russian President Vladimir Putin at the G8 summit in Germany on June 7 (AFP)
MOUNTING TENSIONS. Relations between Russia and the United States have grown increasingly tense in recent months as issues like missile-defense, Kosovo's status, and Russia's domestic policies have provoked sharp, public differences. On June 5, U.S. President George W. Bush said democratic reforms in Russia have been "derailed"....(more)
MORE: A special archive of RFE/RL's coverage of U.S.-Russian relations.