Ukrainian forces have conducted a drone strike on a military base in the Russian city of Novocherkassk, Rostov Oblast.
A second source confirms the drone strike, adding that explosions were reported in the city.
The strike appears to have specifically targeted railway infrastructure in the Persianovsky settlement area of Novocherkassk.
The attack is described as massive and sustained over several hours, with dozens of explosions and visible flashes in the sky.
The message adds visual confirmation of the attack with media showing explosions and air defense activity, and specifies the attack involves 'dozens of explosions' during 'hours of strikes'.
The strike has been confirmed to have hit a specific military base within the city.