A man faces a possible death penalty by shooting after an eight month old girl was beaten then beheaded, say law enforcement sources in Belarus.
The child's mother Natalia Klob, 25, was also detained over the evil incident but women cannot be executed in the ex-Soviet state.
A paramedic doctor fainted when she saw the bloody scene at a house in Luninets.
Klob had been with a family friend only identified as Viktor, 47, when the child called Anna was killed with a kitchen knife.
Her husband Leonid, 28, came home soon afterwards with the couple's two sons and 'saw his daughter lying in the pool of blood, her head severed'.
Reports say the baby had been badly beaten before she was killed.
The mother and her friend had been drinking, according to reports.
Belarus - an ex-Soviet state - is the sole country in Europe to retain the death penalty.
Only men aged between 18 and 65 are executed.
The maximum sentence for women it is up to 25 years in jail