Four former Soviet republics balked at a Russian proposal to tighten control over sales of shoulder-fired missiles that Moscow says have become terrorist tools, news reports said Tuesday. Russian Defense Minister Sergey Ivanov made the proposal Sunday at a meeting of defense ministers of the CIS in Kazakhstan. On Monday, CIS ministers signed an agreement on boosting controls over the sale of portable missile systems, but Uzbekistan, Azerbaijan, Ukraine and Georgia refused to sign. Uzbek officials confirmed that they had not signed the document, but said that was only because Uzbekistan does not produce or sell such weapons. Ukrainian Defense Ministry spokesman said his country had not signed the agreement because it did not belong to the six-member CIS Collective Security Council, and Russia thus had no right to propose changes in Kiev\'s defense policies. The council includes Russia, Armenia, Belarus, Kazakhstan, Kyrgyzstan and Tajikistan. Officials in Georgia and Azerbaijan could not immediately be reached for comment, the Russia Journal reported. (RBC)