Tamara Antonovna Ivanyutina (Russian: Тама́ра Анто́новна Иваню́тина) (née Maslenko, 1941–1990) was a Soviet serial killer who used the extremely toxic poison thallium in her killings.

Tamara Maslenko was born in a large family as one of six children, in which her parents always told her that material security is the main thing in life.

[3] Chemistry teacher Viktor Stadnik, who suffered from Ivanyutina's actions, noted such traits of her character as "perseverance and arrogance", as well as rudeness and lack of discipline.

When the question arose if there was quality control in the school canteen, it was found that a dietitian named Natalia Kukharenko (according to other sources - Kukarenko) had died two weeks before the events, according to official data - from a heart disease.

After that, searches were carried out for all persons who had access to the kitchen, including in the house Tamara Ivanyutina lived, who worked as a dishwasher in the dining room of School N#16.

The family members purchased the Clerici solution from a friend who worked at a geological institute, explaining to her that the poison was for killing rats.

The investigation proved that Tamara's elder sister, Nina Matzobory, using the same solution, had poisoned her husband and taken possession of their Kyiv apartment.

Numerous poisonings were committed by their parents as well: in particular, they killed a neighbour in a communal apartment who was watching television at a loud volume, and a cousin, who made remarks about a toilet.

[9] While detained, Maria Maslenko explained her life position to her cellmates: "To achieve what you want, you do not need to write complaints, but to treat everybody as friends.

45-year-old Tamara Ivanyutina, her older sister Nina Matzobory, as well as their parents - Anton Mitrofanovich and Maria Fedorovna Maslenko, appeared before the court on charges of committing numerous poisonings, including fatalities.