An explosion in Moscow is dead and four wounded

An explosion, whose causes were not known after Monday in Moscow, caused the death of one and four wounded, according to Russian news agencies, quoting official sources whose identity was not determined.
A source in the emergency services told RIA Novosti that “a person was killed and four wounded” in an “explosion” at the entrance to a residential center in northwest Moscow, while TASS news agency quoting officials in the health sector said that the wounded is in critical.