<p>Russia claimed on Monday that an attack by Kyiv’s forces on the separatist stronghold of Donetsk in eastern Ukraine had left 23 people dead, with the military accusing Kyiv of committing a “war crime”.</p><p>Moscow accused Ukraine’s army of firing a Tochka-U missile at a residential area in Donetsk, in one of the most serious attacks on the city since Russia sent troops into Ukraine more than two weeks ago.</p>