Russia is massing thousands of troops in its western neighbor Belarus, raising fears that Moscow might plan to open a new front in its war against Ukraine, but officials from Kyiv to Washington are casting doubt on whether the military buildup represents a serious threat.

With Russia already struggling to defend territory in eastern and southern Ukraine, it can ill afford to pick a new fight on a third front in the north on the border with Belarus, officials and analysts say.

¡°We have to be cautious, but I doubt that Russians are at this moment capable of opening another front line against Ukraine, at least not a successful front,¡± Latvian Defense Minister Artis Pabriks said Friday. He said about 10,000 of the Kremlin¡¯s forces were gathering in Belarus, possibly to try to disrupt the flow of Western weapons into Ukraine from Poland.