Ten Russian soldiers were injured in a blast in the Belgorod region, the TASS news agency reported on Sunday, citing emergency services.
TASS said there was a fire in a local cultural centre overnight where ammunition was also being stored, which caused the explosions.
Russia's Belgorod region borders Ukraine and is home to a number of Russian military bases and training grounds.
(Reporting by Reuters; editing by Guy Faulconbridge and Susan Fenton)
