Untidily dressed children walked along the streets of St. Petersburg.
A one-year-old girl with multiple bruises was on Vasilievsky Island without adult supervision.
Nearby, eyewitnesses noticed a boy and a girl aged 9 and 11 years old, the Investigative Committee's Telegram channel reports.
Three children were taken to hospital. Upon examination it was discovered that they had pediculosis.
Law enforcement officers have established the identity of the mother of the minor children.
It is believed that the minors' mother leaves them alone when she goes to work.
The police will punish the woman for failure to fulfill parental responsibilities.
An investigation has been initiated into this incident under Article 156 of the Criminal Code of the Russian Federation for failure to fulfill responsibilities for the upbringing of minors.
The issue of initiating a criminal case is under consideration.