It's reported Ukrainian forces have now retaken 6,000 square kilometres of their homeland, half of that in the past six days alone.
President Volodymyr Zelenskyy says the "advance of our forces" is still continuing.
It's claimed Ukraine's captured so many Russians, the country's running out of space to accommodate them.
Professor of Peace Studies at Bradford University, Paul Rogers, says he fears Putin may threaten the use of nuclear weapons.
