Russian Security Official Threatens Nuclear Retaliation Amid Ukraine Tensions

Former Russian President Dmitry Medvedev said Russian forces may have to advance as far as Kyiv or Lviv in Ukraine to "destroy this infection". Meanwhile, Ukraine is preparing for an expected counteroffensive as Russian forces are losing momentum. The UN has accused both Russian and Ukrainian forces of summary executions of prisoners of war, while Russia has warned that the use of depleted uranium shells in Ukraine would harm the population. The Kremlin has also called for full transparency in the investigation into blasts that struck the Nord Stream pipelines last September.