A 46-year-old man allegedly told police he murdered his much younger lover before skinning and dismembering her corpse and flushing some of the body parts down the toilet.

The shock killing in Mexico City allegedly happened after an argument between the man, Erik Francisco Robledo, and Ingrid Escamilla Vargas, 25, local media reported.

Reports said neighbours called the Citizen Safety Secretary (SSC) when they saw the man coming out of the building where he lived covered in blood.

Footage shows Erik Francisco in a car with his head bandages and blood on his chest while he reportedly talks to a policeman.

Ingrid Escamilla Vargas Credit: CEN / CEN/Australscope

In the clip he says: “We started to argue and we fought. She said she wanted to kill me and I said do it.”

He added: “She took a knife and I said do it at once. She stabbed me once and I said do it stronger. And she tried two more times”

When he is asked why he dismembered the woman’s dead body he answered: “I did not want anyone to know.”

He added: “I used the same knife she attacked me with to stab her in her throat. I threw pieces of her dead body to the drainage system because I felt ashamed.”

Ingrid was allegedly killed by her much older lover. Credit: CEN / CEN/Australscope

Reports claim the alleged murderer then used a kitchen knife to skin the dead body and remove parts of flesh before throwing them down the toilet and into the sewer.

The police reportedly found the kitchen knife used to dismember the woman as well as parts of the dead body. There was also blood in the apartment.

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Local media reported that the police also found a plastic bag containing body parts few blocks away from the apartment where the alleged crime happened.

The authorities are investigating the case.