 Ukraine struck deep into Russia again. Three Russian military personnel were killed early on Monday by falling wreckage of a Ukrainian drone that was shut down as it was attacking a base in Russia's Serhotov region. Russian news agencies reported siding the Defense Ministry. It was the second attack on the base this month. A Ukrainian unmanned aerial vehicle was shot down at low altitude while approaching the angles military airfield in the Serhotov region. News agencies reported the Russian ministry as saying, as a result of the fall of the wreckage of the drone, three Russian servicemen of the technical staff who were at the airfield were fatally wounded. The base near the city of Serhotov about 730 kilometers or 450 miles southeast of Moscow and hundreds of kilometers from the front lines in Ukraine was hit on December 5th in what Russia said was a Ukrainian drone attack on two Russian airbases that day. The twin strikes dealt Russia a major reputational blow and raised questions about why its defenses failed, analysts said. As attention turned to the use of drones in the war between neighbors. Ukraine has never publicly claimed responsibility for the attacks in Russia but has said, however, that such incidents are karma for Russia's invasion. The Russian Defense Ministry said that aviation equipment was not damaged but according to unofficial Russian and Ukrainian social media reports, a number of planes were destroyed. Reuters was not able to independently verify the reports. Earlier on Monday, Roman Busagin, the governor of the Serhotov region, said that civil infrastructure facilities were not damaged in the incident. There is absolutely no threat to residents. Civil infrastructure facilities were not damaged, Busagin said.