An explosion at a major gas export terminal near the city of St Petersburg in Russia was carried out by Ukrainian drones, BBC News has been told.

The blast caused a large fire at the Ust-Luga terminal, but no injuries, Russian officials said.

An official source in Kyiv said the “special operation” of the SBU security service masterminded the attack, with drones that worked “on target”.

Both Russia and Ukraine have used drones in the current conflict.

Russia launched its full-scale of invasion of Ukraine nearly two years ago, but has made little progress in recent months.

Regarding the explosion near St Petersburg, regional governor Alexander Drozdenko said a “high alert regime” was in place after the incident at the terminal of gas producer Novatek, in Ust-Luga on the Gulf of Finland. He shared a video of what appeared to be a large fire.