We don't know how bad the damage is. Ukraine's military hasn't said anything yet.
That's everything we know.
Why this mattersSo why does one plant in Russia matter?
Because of what it makes. The Redkino plant produces fuel for Kh-55 and Kh-101 missiles. Those are the cruise missiles Russia fires at Ukrainian cities, again and again, including in recent mass strikes on Kyiv.
It also makes fuel additives for diesel and jet fuel. The US, the UK and other countries have already put it under sanctions.
And here's the thing. This wouldn't be the first time Ukraine has hit it.
Ukraine struck this same plant eight months ago, on 7 February. Drone operators from the SBU's Alpha Special Operations Centre carried it out, an SBU source said, and it started a large fire.
At the time, Vitaly Korolev, the acting governor of Tver region, said on Telegram that a fire broke out at a plant in the area while air defences were dealing with a drone attack. He said nobody was hurt. He later said the fire was out and the plant's production wasn't affected.
NASA's fire-tracking system picked up active burning on the site after that strike. The independent Russian outlet ASTRA matched video to the plant and said residents described explosions, fire and a strong chemical smell. ASTRA says the same plant was also hit in September 2023 and June 2024.
Andriy Kovalenko, who runs Ukraine's Centre for Countering Disinformation, said after the February strike that the plant makes small batches of chemical components for military use. That includes propellant, explosives, initiators and process chemicals.
So if tonight's strike is confirmed, this is at least the fourth time Ukraine has hit the same plant in three years.
But right now, nothing is confirmed. The only account of tonight comes from a Telegram channel quoting residents. Not Ukraine's military. Not the SBU. Not Russia.
Nobody has said how big the fire is. Nobody has said if the plant was even hit. Nobody has said if this comes close to what happened in February.
Three questions are still open. Did Ukraine's forces do this. How much damage was done, if any. Will Russia say anything at all.
None of them are answered yet.