The bodies of a man and a woman were found in a house in the town of Krasny Sulin, Rostov region. The incident happened on December 25.
The DonDay news portal wrote that perhaps the death of two people occurred due to poisoning with an unknown substance.
According to the newspaper's sources, the cause of the Russian's death has not yet been determined. A forensic examination is being performed.
Before reportedthat on Thursday two more corpses were found in the village of Romanovskaya near Rostov. A naked pensioner and his dead wife were found strangled in a house near the police station.
