Russia-Ukraine live news: Ukrainian troops make Kharkiv gains

• Ukraine says troops defending the country’s northeastern region of Kharkiv have pushed Moscow’s forces back to the Russian border.
• Russia warns potential bids by Finland and Sweden to join the NATO military alliance are a “grave mistake” that will increase “military tension” in Europe.
• NATO chief says Ukraine “can win the war” and calls for allies to step up their military support for Kyiv.