Russia is warning it will take retaliatory steps if any country deploys weapons in space.
Russian Defense Minister Sergei Ivanov says Moscow's position on the issue has remained unchanged for decades in that Russia remains categorically against the militarization of space.
He made the comments Thursday in Kazakhstan.
Last month, White House press secretary Scott McClellan said the United States is reviewing a draft updated national space policy - but that policy does not look at the weaponization of space. However, he did say that protecting U.S. space systems is something that has to be considered.
The Interfax news agency also quotes Mr. Ivanov as saying Moscow is prepared to negotiate an agreement on controlling tactical nuclear weapons - but only when all countries with such weapons keep them within their own territories.
The United States has such weapons in Europe.
Some information for this report provided by AP and AFP.