After two weeks of relative calm, mayor of city warns residents who have left that it is not safe to return

• Russia-Ukraine war: latest updates

An arms plant in Kyiv destroyed by Russian long-range air-launched rockets allegedly produced at least one of the missiles used to sink the Moskva warship.

The attack on Friday was widely regarded by both parties as the most significant revenge strike by the Kremlin after the sinking of Russia’s flagship vessel in the Black Sea and a reminder that, despite being liberated from the occupants, the war in the Ukrainian capital is far from over.

Russia’s foreign ministry has barred entry to the country for the prime minister, Boris Johnson, the foreign secretary, Liz Truss, the defence secretary, Ben Wallace and 10 other British government politicians and members. The move was taken “in view of the unprecedented hostile action by the British government, in particular the imposition of sanctions against senior Russian officials”, Reuters reports the ministry said in a statement.

The battle for Mariupol is continuing. If Moscow captures the city, home to 400,000 people before the invasion, it would be the first big city to fall.

Nine humanitarian corridors have been agreed for Saturday, the Ukrainian deputy prime minister, Iryna Vereshchuk, announced. Five of the nine evacuation corridors are from the east, in Ukraine’s Luhansk region, which local officials have said is under heavy shelling.