On December 5, 2006 Russia carried out a successful test of an interceptor of the A-135 missile defense system, deployed around Moscow. The test was conducted around 11:00 MSK (08:00 UTC) at the Sary-Shagan test site in Kazakhstan. The Space Forces announced that the test was part of the program to extend operational life of the interceptors.
It is not immediately clear whether it was a short-range 53T6 or a long-range 51T6 interceptor. Some reports indicate that the interceptor was of the same type as the one tested on November 29, 2004, which was believed to be a short-range 53T6. Earlier tests of A-135 interceptors took place on November 2, 1999 (53T6) and on October 2, 2002 (51T6).
UPDATE: Kommersant reported that it was a test of the short-range 53T6 interceptor. Moreover, according to Kommersant, all 32 long-range interceptors of the A-135 system have been already withdrawn from service.