Warsaw city councilors have banned a 1945 monument of Polish-Soviet brotherhood in arms from being returned to its place on a city street.

The move, a reversal of their own previous decision, comes as ties between Warsaw and Moscow are strained over the conflict in eastern Ukraine.

The councilors voted 51-2 late Thursday to keep the massive monument, generally referred to as the "four sleeping men," in a storeroom. It was temporarily taken there in 2011 to allow for the construction of a subway line in the area.

The monument was put up in 1945 in Warsaw's Praga district to commemorate the joint struggle of Soviet and Polish troops against the Nazis. But after the 1989 fall of communism, the monument became an unpopular symbol of that hated political system.