Seven people were killed in an explosion at a chemical plant in Russia’s Moscow region, the Telegram news channel Shot reported, as emergency crews responded to a fire at the facility.

The blast hit the Krasnozavodsk Chemical Plant, which produces ammunition and pyrotechnics, according to publicly available information. Authorities had not commented on the incident, and the reported death toll remained unconfirmed.

Shot reported that the seven people were inside workshop No. 4, which collapsed completely. Survivors said more workers had been inside, the channel reported, adding that rescue operations were continuing.

The Telegram channel Mash, citing local residents, reported three powerful explosions that shook nearby homes before a fire broke out. More than 40 workers were at the plant at the time, and an evacuation was underway, it said.

The Telegram channel 112, which has close ties to Russian law enforcement agencies, also reported an explosion and said emergency services were heading to the site.

Footage filmed by witnesses showed flames and a column of smoke rising above the plant.

Preliminary reports pointed to a technical cause for the explosion. No aerial attacks had been reported in the area.

The plant was previously targeted in a Ukrainian attack on July 7, 2025. Ukraine’s military said at the time that the facility produced thermobaric warheads for Shahed-type drones, known in Russia as Geran drones.

Ukraine’s Center for Countering Disinformation, part of its National Security and Defense Council, said the plant also produced explosives, gunpowder and components for ammunition and missile systems. It described the facility as part of the supply chain for Russian artillery shells, multiple-launch rocket systems and ballistic missiles.