Ukraine launched drone attacks on industrial sites in Russia, leaving nine people dead, most at industrial facilities in Volgograd and Samara.
In response, Russia said it shot down 1,198 Ukrainian drones overnight.
The violence comes as peace talks led by the US remain stuck, with both sides trading deadly strikes.
Russian strikes kill civilians in Ukraine
Russian attacks hit back hard in Ukraine too: a hospital strike in Kyiv forced people to take shelter, and deadly blasts killed civilians across Odesa, Zaporizhzhia (including a teenager was killed and two children were wounded), and Rivne.
The ongoing fighting is making any hope for quick diplomatic progress look pretty tough right now.