An explosion has occurred at a gas export terminal near the city of St Petersburg in Russia, officials say.
The blast caused a large fire, state-owned RIA Novosti news agency said. It said the fire had been contained, and there were no reports of injuries.
The cause of the fire is not known, but local media have reported that drones had been seen in the area.
Both Russia and Ukraine have used drones in the current conflict. Ukraine usually does not admit such attacks.
