(Reuters) – Russia struck the Pechenihy dam on the Siverskyi Donets River in northeast Ukraine this week using short-range ballistic missiles or similar weapons, the British military said on Saturday. The attack on Sept. 21 and 22 followed an earlier one on the Karachunivske dam near Krivyi Rih in central Ukraine on Sept. 15, the Defence Ministry said in its daily intelligence bulletin, adding that Ukrainian forces are advancing further downstream along both rivers. Russian commanders may be attempting to strike sluice gates of the dams in order to flood Ukrainian military crossing points, the…