Ukraine said Tuesday it had fired US-supplied long-range missiles into Russian territory in the first such strike, as Russia declared a “new phase” in the conflict and eased its protocol for nuclear strikes.A senior official told AFP that a strike on Russia’s Bryansk region earlier on Tuesday “was carried out by ATACMS missiles” -- a reference to the US-supplied Army Tactical Missile System.Speaking 1,000 days since Russia invaded Ukraine, Foreign Minister Sergei Lavrov criticized Washington’s decision to authorize Kyiv to use such missiles, which have a range of up to 300 kilometers (186 miles).“We will be taking this as a qualitatively new phase of the Western war against Russia. And we will react accordingly,” Lavrov told a press conference at the G20 summit in Brazil.For the latest updates on the Russia-Ukraine war, visit our dedicated page.The grim milestone opened with a Russian strike in the eastern Ukrainian region of Sumy that gutted a Soviet-era residential building and