- Summary- Some in Russia alarmed by audacious drone forays- Kyiv analysts see strikes as blow to Kremlin's image- Russian military bloggers grumble about warplane damage- Moscow says Ukraine used Soviet-era drones for attackKYIV, Dec 6 (Reuters) - Twin strikes on air bases deep inside Russian territory have dealt Moscow a major reputational blow and raised questions about why its defences failed, analysts said, as attention turned to the use of drones in the war between neighbours.Kyiv also said on Sunday it was making progress with a new indigenous combat drone with a range of 1,000 km (665 miles).It remains to be seen whether Russia seeks to retaliate; it unleashed the first wave of its bombardment campaign shortly after an attack on a key bridge leading to annexed Crimea that it said was organised by Ukrainian military intelligence.The damage to the warplanes sparked renewed grumbling among Russia's military bloggers, whose social media posts can provide a window into the mood in Russia on the course of the war unleashed by Russia's invasion of Ukraine in February.The Defence Ministry in Moscow said Ukraine used Tupolev Tu-143 drones laden with explosives in July to conduct strikes in the southern Russian regions of Belgorod and Kursk that border on Ukraine."