Two people suffered shrapnel wounds following an explosion on Sunday in the town of Kireyevsk, around 220 km (140 miles) south of Moscow, the TASS news agency cited emergency services as saying.
The cause of the explosion was not immediately known, but it left a crater in the centre of the town, in the Tula region.
"The explosion sounded at 1519 (1219 GMT). Two victims, born in 2002 and 2006, have shrapnel wounds. Emergency services are on the scene," TASS quoted a local emergency services representative as saying.
"There is a crater. This explosion was in the heart of the city," the representative added.
The representative said the injuries were not life threatening and that investigators were working at the site.
(Reporting by Reuters; Editing by Gareth Jones)
