Tambov's governor ruled out an attack or sabotage.

坦博夫省长排除了袭击或破坏的可能性。

The authority said a dozen people were also injured at the plant, located in the Tambov region, southeast of Moscow.

发生事故的工厂位于莫斯科东南部坦博夫地区，当局表示还有12人受伤。