Siren alert checks held to 'prepare for enemy invasion' in Russia

Authorities conducted alert siren checks in Saint Petersburg, Russia to prepare for potential enemy invasions and government emergencies.

Footage shows the warning alarms blaring across the city on October 4. The sirens were followed by an announcement in Russian, saying: 'Attention! Attention. If you hear this sound, you should switch the TV or radio on and listen to further instructions.'