The General Staff said the defending forces had seized the city from the Russians and inflicted heavy losses on Putin's men.
The eastern city of Chuhuiv in Ukraine captured by Russian forces has been recaptured by Ukrainian forces.
The revelation was made by Ukraine's defence officials.
The General Staff said the defending forces had seized the city from the Russians and inflicted heavy losses on Putin's men in both personnel and equipment.
Two high-ranking Russian commanders were killed in the battle.
The strategic city of 31,000 people is located 23 miles from Kharkiv, the second biggest city in Ukraine which has been subjected to intense bombardment.
The General Staff said on Facebook: 'In the course of hostilities, the city of Chuhuiv was liberated.
'The occupiers suffered heavy losses in personnel and equipment.
'Lieutenant Colonel Dmitry Safronov, Commander of the 61st Separate Marine Brigade of the Russian Armed Forces, and Lieutenant Colonel Denis Glebov, Deputy Commander of the 11th Separate Airborne Assault Brigade of the Russian Armed Forces, were killed.'
The city had suffered intense shelling since the start of the war, and was the site of an airstrike which severely wounded a woman, 52, who has since become one of the defining images of the war
Despite the heavy bombardment, Ukraine have now been able to hold off Russia and even launch counterattacks to regain the city.
It comes as cities were hit by fresh bombardments this morning with Vladimir Putin's invasion entering its twelfth day.
Volodymyr Zelensky vowed that 'God will not forgive' and Ukraine 'will not forget' the slaughter of civilians by Russian, saying a 'day of judgement' is coming for them.
Zelensky, in a late-night address to his countrymen on the Orthodox Christian holiday of 'Forgiveness Sunday', recalled how a family of four were among eight civilians killed by Russian mortars while trying to flee the city of Irpin - near Kyiv - earlier in the day.
'We will not forgive. We will not forget,' he told listeners. 'We cannot forgive the hundreds upon hundreds of victims. Nor the thousands upon thousands who have suffered,' he added. 'God will not forgive. Not today. Not tomorrow. Never.'