A resident of St. Petersburg was arrested in the Leningrad region and is suspected of murdering a child and an elderly woman. The 40-year-old man said he committed the alleged crime because his wife was unfaithful. The day before, the bodies of a one-year-old boy and his 58-year-old grandmother were found in an apartment in the Krasnoselsky district. The boy's 32-year-old mother was also injured - she managed to escape the attacker. According to preliminary information, the detainee worked as a math teacher.