According to Busan Police Department, around 8:30 pm on December 30, a delivery man found the dead body of a woman covered in blood in a garden of an apartment. 

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When the police arrived at the scene, they found the woman along with her 4-year-old son identified as 'A' and 2-year-old daughter identified as 'B' unconscious in the apartment garden. 

The son 'A' was declared dead on the spot. The daughter 'B' regained consciousness, however, she suffered major injuries and the vast majority of the bones in her body were fractured. Currently, she's receiving treatment in the hospital.

The police claim the mother first choked her young son to death, then threw both of her children out the veranda. She also committed suicide by jumping out the window after her kids. 

Records show the mother suffered from a mental illness.