OUR Ukraine created a network of agents and supporters within himself Russiathe purpose of which is to carry out sabotage against Russian targets and provide them with drones for attacks, CNN reports.

U.S. officials believe these pro-Ukrainian agents inside Russia also carried out a drone attack on the Kremlin in early May, launching them from inside Russia rather than Ukraine.

However, it remains unclear whether other drone attacks in recent days have come from inside Russia or carried out by this network of pro-Ukrainian operatives.

However, US officials believe that Ukraine has set up sabotage cells in Russia, made up of supporters of pro-Ukrainian sympathies and operatives well-prepared for such attacks. They also believe Ukraine supplied them with Ukrainian-made drones, while two U.S. officials told CNN there is no evidence that any drone strikes were carried out by U.S.-supplied drones.

Officials said they were unsure if Ukraine had managed to move drones behind enemy lines, but two sources explained that it had established well-established routes that could be used to send such equipment to Russia.

^{Source: CNN}