An explosion occurred at the Transneft oil refinery in the city of Usinsk, Komi Republic, followed by a large fire. According to Baza, all plant employees were promptly evacuated, and fire brigades were sent to the scene of the incident.

The incident occurred suddenly; the cause of the explosion is still unknown. An investigation is currently underway to clarify the circumstances and causes of the incident. Information about the drone attack has not yet received any official confirmation.

Witnesses reported thick black smoke rising from the plant and intense efforts by firefighters to contain and extinguish the fire.