The crash site was near Gubastovo, half way between Moscow and Ryazan
Russian president Vladimir Putin has ordered officials to tighten control of the border with Ukraine after a spate of drone attacks delivered a new challenge to Moscow more than a year after the invasion of its neighbour.
While Putin did not refer to any specific attacks in a speech in Moscow, his comments came hours after drones targeted several areas in southern and western Russia and authorities closed the airspace over St Petersburg in response to what some reports said was a drone.
Images shared online appear to depict a Ukrainian UJ-31 'loitering munitions' kamikaze flying bomb after it crashed down near a gas plant more than 300 miles from the border.
Images shared online appear to depict a Ukrainian UJ-31 'loitering munitions' kamikaze flying bomb after it crashed down near a gas plant more than 300 miles from the border. It came down near the village of Kolomna hours after Russia's Defence Ministry accused Ukraine of two attempted drone strikes in the south overnight
Ukraine does not publicly claim responsibility for attacks inside Russia.
If it was behind the Kolomna drone, it would be its closest attempted strike to Moscow since the start of the invasion of Ukraine.
It is also the deepest inside Russian territory any suspected Ukrainian drone has been spotted.
Postings on Russian social media showed the broken grey metal drone in a snowdrift in a woodland area said to be near Kolomna.
Regional governor Andrei Vorobyov said the drone appeared to have been intended to hit a 'civil infrastructure facility' but noted that there was no damage.
He said the FSB security agency was handling the situation and there was no threat to residents.
There is a gas compressor plant close to the crash site.
Reports claimed the low-flying drone may have clipped trees.
Earlier, the Russian Defence Ministry accused Ukraine of sending attack drones towards civil infrastructure targets in the southern regions of Adygea and Krasnodar.
It said its electronic anti-drone jamming systems had caused them to miss their targets.
The ministry said: 'Both drones lost control and deviated from their flight paths.'
Pictured: Ukrainian UJ-22 drone (file photo)
The strikes caused no casualties but provoked a security stir as the war with Kyiv stretches into its second year.
Russian forces early on Tuesday shot down a Ukrainian drone over the Bryansk region, local governor Aleksandr Bogomaz said in a Telegram post. He said there were no casualties.
Three drones also targeted Russia's Belgorod region on Monday night, with one flying through an apartment window in its namesake capital, local authorities reported.
Regional governor Vyacheslav Gladkov said the drones caused minor damage to buildings and cars but no casualties.
While Ukrainian drone strikes on the Russian border regions of Bryansk and Belgorod that lie north of Ukraine's Sumy region are not unusual, the hits on the Krasnodar and Adygea regions further south are noteworthy.
A fire broke out at an oil depot in Russia's Krasnodar region, which neighbours Adygea, on Monday, Russia's state RIA Novosti agency reported. Russian Telegram channels claimed that two drones exploded near the depot.
A drone also exploded overnight over Adygea, which lies 370 miles east of Crimea, regional governor Murat Kumpilov said on Telegram. He said no one was hurt in the attack, which damaged some farm buildings.
Ukrainian authorities offered no immediate acknowledgement or comment on the reported strikes.
Last year, Russian authorities repeatedly reported shooting down Ukrainian drones over annexed Crimea. In December, the Russian military said Ukraine used drones to hit two bases for long-range bombers deep inside Russian territory.
Separately, the local government of St Petersburg - Russia's second-largest city 800 miles north of the border with Ukraine - said early on Tuesday that it was temporarily halting all flight departures and arrivals at the city's main airport, Pulkovo. It did not give a reason for the move.
Hours earlier, unconfirmed reports on Russia's Telegram social network referred to the air space over St Petersburg being shut down and to Russian warplane overflights. It was not immediately clear whether this was connected to the alleged rise in drone attacks in Russia's south.
The Russian military said its air defence forces in Western Russia conducted drills on 'detection, interception and identification' of enemy targets in its air space, as well as in coordination with civilian air traffic services in an emergency situation.
Comment: Daily Beast reports that initial commentary said that air defenses were mobilised because of an 'unidentified flying object':
Hours later, St. Petersburg's Pulkovo Airport came to a standstill as authorities shut down the surrounding airspace, reportedly in response to an "unidentified flying object" spotted in the area.
Local authorities confirmed to RIA Novosti that incoming and outgoing flights were temporarily halted, though they gave no reason for the move. Meanwhile, Baza reported, fighter jets were deployed to take down the "object."
A short while later, however, Russia's Defense Ministry claimed the whole thing had simply been a training exercise, and the airspace was reopened.
Inside Ukraine, authorities said that at least two civilians were killed by renewed Russian shelling in the southern city of Kherson and surrounding villages and 17 more were injured in fighting over the previous 24 hours.
The fiercest fighting continued to be in eastern areas of Ukraine, where Russia wants control over all four of the provinces it illegally annexed in September.
Ukrainian officials said Russian forces have deployed additional troops and equipment, including modern T-90 tanks, in those areas.
Which satellite constellation do the Uke drones use to home-in on their targets well inside of Russia?