As snow fell in a wooded area of Ukraine, the long-range attack drones accelerated one by one down an unlit, abandoned road and their whirring engines propelled them into the night sky.

Ukraine has intensified missile and drone strikes on Russia. Russian air defenses are stretched, prompting efforts to find other approaches to protect domestic targets.

The Security Service of Ukraine (SBU) and Ukraine’s Special Operations Forces (SOS) struck the Ryazan Oil Refinery and the Ryazan Thermal Power Plant in an overnight drone strike on Jan. 24, an SBU source told the Kyiv Independent. The attack was later confirmed by the General Staff of Ukraine’s Armed Forces.