In Russia’s Saint Petersburg, the Research Institute of Marine Thermal Engineering, which is considered a key Russian enterprise involved in the development of underwater weapons, may have been targeted in an attack.

This is according to OSINT analysis by Astra, Ukrinform reports.

Eyewitnesses published photos showing smoke rising over the district. According to Astra’s analysis, the smoke may be coming from the building of the Research Institute of Marine Thermal Engineering, which is believed to be a key Russian facility involved in the development of underwater weapons.

The institute is a defense-oriented research and design center specializing in torpedo weapon systems and propulsion units for underwater weapons used by the Russian Navy. It was established in 1948 as a specialized center for the development of long-range thermal torpedoes for the Soviet Navy.

It is considered one of the core institutions of Russia’s underwater weapons development program.