Explosions reported in Russian city of Engels, air-raid siren sounded

 An air-raid siren has been sounded over the Engels airfield, in Saratov Oblast of the Russian Federation; explosions have been reported.

Source: Baza, russian media outlet with sources in the security services;  Engels Telegram channels

Details: An air-raid siren is being sounded in the city of Engels near the airfield. Local residents have reported explosions.

Preliminary information indicates that there are casualties.