Heavily pregnant Nadia Avila (pictured) was butchered with a kitchen knife by Maria Rodriguez in Tepic, Mexico, according to police confession

A Mexican woman has confessed to stabbing an eight-months pregnant mother in the stomach with a kitchen knife so she could steal her unborn baby from the womb, according to police.

In a graphic confession, Maria Rodriguez, 29, from Tepic, Mexico, told police she decided to kill Nadia Avila and remove her baby after lying to her family about being pregnant.

She will now appear in court on two charges of murder, for the baby and the baby's mother, according to police.

In the chilling video confession Rodriguez says she first beat her victim unconscious after luring her to her home in Tepic with a promise of free baby clothes.

She said: 'When I covered her mouth, she bit me and then I took her hands behind her back to defend myself, but I did not kill her then.

'She was shouting, asking me to leave her in peace. Then I beat her again and she fell to the ground unconscious and then I opened her stomach.

'I just lowered her trousers and stabbed her stomach. She reacted a bit in that moment, but just a bit.

'I held her arms down and I took the baby as soon as I could in order to take the baby before it suffocated.

'But I could not take the baby. I tried but it was impossible and the baby came out dead.'

Rodriguez told police she was 'obsessed' with having a baby and did not know how to admit to her family that she was not pregnant.

'I had a delayed period and I checked my blood but the results were negative,' said Rodriguez.

'I was obsessed with having a baby and all my family thought I was pregnant. But this was a lie and I did not know how to get out of it. I thought there was nothing I could say, but when I saw her I thought about this idea.

'I did not know anything about her, I had just seen her twice.'

Maria Rodriguez, 29, (pictured) from Tepic, Mexico, told police she decided to kill Nadia Avila and remove her baby after lying to her family and telling them that she was pregnant

Rodriguez was caught when she called paramedics to take the baby to hospital, so she could tell her family it had arrived stillborn

Ms Avila was stabbed after Rodriguez lured her to her Tepic home with a promise of free baby clothes

'When I saw her stomach it came to mind to do this, how I could manage to end the lie. And it came to my mind to steal her baby in order to continue the lie,' said Rodriguez.

She explained to police that she saw Ms Avila several times when the pregnant woman was taking her son to school.

On the day she approached and killed her, Ms Avila was going to the school to attend a meeting.

'When I saw her stomach it came to mind to do this, how I could manage to end the lie. And it came to my mind to steal her baby in order to continue the lie.

Ms Avila with her husband Juan Hernandez, who notified police in Mexico that she was missing

'We started to talk and I asked her how long she was pregnant and what the baby will be, if it was a girl or a boy, and she told me she was going to have the baby in just days, and it came to my mind to do it.'

Rodriguez was caught when she called paramedics to take the baby to hospital, so she could tell her family it had arrived stillborn.

'They were immediately suspicious of her story but she would not let them into the house where her victim's body was,' said a police spokesman.

Rodriguez fled when medics insisted on examining her but was arrested after her victim's husband Juan Hernandez reported her missing.

Police connected the disappearance to the suspicious birth and tracked down Rodriguez who had gone into hiding.

'The suspect has made a full confession to a shocking, terrible crime and will appear in court on two charges of murder, for the baby and the baby's mother,' said police.