A large explosion and fire destroyed or heavily damaged a Russian border troops headquarters in Rostov, Russia, which officials claimed was caused by a short circuit.

A large explosion and fire destroyed or heavily damaged a Russian border troops headquarters in Rostov, Russia, which officials claimed was caused by a short circuit.

A building on 20/2 Sivers Avenue is on fire. Telegram channels publish photos and videos of the fire.

Eyewitnesses heard sounds 'similar to pops' before the smoke. According to preliminary data, the cause of the fire was an explosion at the warehouse of the local FSB Border Department.

The Russian partisan movement 'Black Bridge' reported that it contributed to the fire in the building of the FSB border management in Rostov-on-Don.

The movement claims the fire was caused by an improvised device containing ammonal and acetone triperoxide triggered by a burning light bulb, contradicting official statements about electrical wiring shorting.