A 34-year-old Serbian woman has been arrested on suspicion of murdering and dismembering her 67-year-old 'sex slave'.

Marina Becanovic allegedly beat Petar Petrovic to death in Guncati, in the suburbs of Belgrade on January 10, after abusing him for the last three years.

After killing the 67-year-old, she cut off his genitals and threw them on a stove, then wrote a message to his family saying she was 'finished with him.'

Marina Becanovic, 34, is said to have asked her sex slave, Petar Petrovic, 67, for money before lashing out furiously when he denied her

The authorities say Petrovic was tied up and tortured - burned with cigarettes and slashed with a blade - before he was beaten to death.

Becanovic is then said to have hacked his body with an axe before slicing off his genitals and throwing them into the burning stove.

Neighbours say Becanovic had kept the besotted man - 33 years her senior - as her slave, saying the large woman threw him around.

Petar Petrovic, 67, had been kept at her home for three years, doing chores and providing his abusive lover with cash

A neighbour said: 'That woman was constantly abusing and torturing him. She beat him, kicked him, stabbed him with a knife. She treated him as her slave.'

She said the dead man had been obsessed by her, adding: 'He went to the police a few times to report her, but he always went back to her.

'Marina was so brutal that once she lifted Petar in her arms, because she is bigger than him, and threw him onto the ground.'

A homeless man said to be Becanovic's drinking partner - likely another lover - was reportedly a witness to the murder which allegedly occurred after the victim refused to give the suspect money.

The sex slave was forced to clean around the house and garden, as well as accept other men passing through who Becanovic took as lovers, the Kurir reported.

Becanovic (left and right) was described as a large, heavy drinking woman who would throw the elderly man around

Becanovic reportedly called her father who told her to get the police when he saw the bloody Petrovic

After asking her father to help her cover the crime he reported the case to the police and Becanovic was arrested.

He told the Belgrade tabloid that his daughter had admitted to killing Petrovic with a wooden pole and that there was plenty of brandy and beer in the blood spattered bungalow.

An autopsy confirmed that the victim had suffered a broken rib which pierced his lung.

It is unclear whether the investigation is complete or if the suspect has been charged.