Blasts rock Kharkiv as Zaporizhzhia hit with ‘kamikaze drones’; Zelenskiy warns on nuclear weapons; Moscow declares Russian rapper a ‘foreign agent’

• See all our Ukraine coverage

Kyiv’s troops advanced in southern Kherson province and made additional gains in east

• Russia-Ukraine war – live updates

Russia no longer has full control of any of the four provinces of Ukraine it says it annexed last week after Ukrainian troops advanced dozens of kilometres in Kherson province in the south of the country and made additional gains in the east.

On Monday, the Russian military acknowledged that Kyiv’s forces had broken through in the Kherson region. It said the Ukrainian army and its “superior tank units” had managed to “penetrate the depths of our defence” around the villages of Zoltaya Balka and Alexsandrovka.

Troops raise Ukrainian flag in city hours after Putin said area was Russia’s ‘for ever’, with Moscow admitting its forces have retreated

• Russia-Ukraine war – latest updates

Russia suffered a humiliating military defeat on Saturday when Ukrainian troops liberated the key eastern city of Lyman, with videos showing them raising a blue and yellow national flag and performing a victory dance.

In a severe embarrassment for Vladimir Putin, Russia’s ministry of defence admitted its soldiers had retreated. They had been “withdrawn to more advantageous lines”, the ministry said, after their encirclement by Ukrainian forces.

At least 25 people killed as Russian missiles hit civilian convoy; Vladimir Putin to formalise annexation of four occupied regions of Ukraine

• See all our Ukraine coverage

A civilian convoy of cars heading to pick up relatives trying to flee Russian occupied territory in Ukraine has been hit by Russian forces near the city of Zaporizhzhia, with initial reports saying at least 25 people were killed and 50 people injured. Footage posted on social media showed a horrific scene with dead and injured people lying on a road on the south-eastern outskirts of the city.

The governor of Zaporizhzhia region, Oleksandr Starukh, said in a statement: “The enemy launched an attack on a civilian convoy and the outskirts of the city. People were standing in line to leave for the occupied territory to pick up their relatives and to deliver aid. There are dead and wounded. Emergency services are at the site.

According to locals, 60 cars had gathered on a road in two lines after registering for a convoy that was due to take people back into the Russian-occupied territories in the south, some planning to return to homes in places such as Mariupol, others planning to fetch relatives and bring them to government-occupied territory for fear that Russia will prevent people from leaving. In the hours before the attack, Russia launched strikes on several cities, including the centre of the nearby city of Dnipro.

The attack on the convoy on Friday morning came amid a feared Russian escalation in its war in Ukraine, as the Russian president, Vladimir Putin, prepared to publicly sign annexation orders for four regions.

Putin will sign accession documents at the Kremlin before delivering a speech. A pop concert is also planned on Red Square, where a stage and screens have been set up. The territory Russia controls amounts to about 15% of Ukraine’s total area.

The Kremlin said again on Friday that it would consider attacks against any part of the regions of Ukraine that it is about to annex – Luhansk, Donetsk, Zaporizhzhia and Kherson – as acts of aggression against Russia itself.

Kremlin spokesman Dmitry Peskov told reporters Russia would “de jure” incorporate parts of Ukraine which are not under the control of Russian forces. Of the four regions, Luhansk and Kherson are the only territories that Russia is close to having total control over.