Ukraine said on Friday it was building a reinforced concrete wall and other fortifications on its border with Belarus, a close Kremlin ally that Moscow used as a staging ground for its Feb. 24 invasion of Ukraine. Presidential adviser Kyrylo Tymoshenko said a 3 km barbed-wire-topped wall had gone up in the region of Volyn on the border with Belarus, which Kyiv says remains a threat. There were also sandbags and trenches, he said.
