Ukraine has broken the "stalemate" on the frontline and is making progress in its counteroffensive against Russia, a senior Kyiv official claimed. The embattled nation began its long-awaited counteroffensive in June this year against the Russian invaders. But progress has been slower than anticipated as Ukrainian forces try and take heavily fortified Russian positions, surrounded by landmines. Ukrainian Deputy Defence Minister Hanna Maliar brushed aside any suggestion that Kyiv's progress was too slow and said Ukraine had military doctrine by attacking an enemy that has a numerical advantage in manpower and weaponry. Ms Mailar said: "It's incorrect to measure this advance by metres or kilometres. "What's important is the very fact that despite everything, we're moving forward even though we have fewer people and fewer weapons." Her claims were also backed up by the US as White House national security advisor Jake Sullivan told a briefing on Tuesday: "We have been clear all along that this battlefield is very dynamic."We are seeing it (Ukraine) continue to take territory on a methodical, systematic basis." Read More Putin was meant to be at a summit in South Africa this week. Why was he asked to stay away? Russian mercenary leader Yevgeny Prigozhin said to be recruiting Wagner 'strongmen' for Africa On the ground in Ukraine, the desperate fight to protect a key city from 100,000 of ‘Putin’s thugs’