Chilling CCTV footage has emerged of a man wheeling the corpses of two dismembered children in a box just metres from a police officer.
The man, known as Edgar Z, has been arrested on suspicion of the murder of two teenage boys – Hector Efrain, 14, and Alan Yair, 12 – in Mexico City.
Security footage released by the police shows how the watching police officer became alarmed.
Edgar Z is seen pushing the boxes along the pavement before his trolley wheels appear to jam and he ends up crashing into a container by the side of the road.
He spends several seconds fighting to right the trolley and carry on his journey.
The mishap is said to have sparked his arrest and the discovery of the remains of two missing children including a human arm, shoulder and ear after they spilt from the boxes onto the tarmac.
A police officer, circled in the top left-hand corner of the footage screened on Mexican TV, is standing just a few feet away when the extraordinary scene unfolds
Three men have so far been arrested over the murders of Hector Efrain, 14, and Alan Yair, 12, who were last seen on October 28.
The youngsters have been described as street sweet sellers who were thought to have started working for a local crime boss by dealing drugs on the side.
Before being dismembered the children are said to have been beaten, according to local reports.
Edgar Z is said to have been held after his faux pas with the boxes when police went to help him and discovered its macabre contents.
The gang said to be behind the horrific crimes has been named as Union Tepito, a criminal organisation created in 2009 linked to drugs trafficking, kidnap, extortion and murder.
Edgar’s boss Jose David N, alias El Chayan, has also been arrested.
The third detainee has been named only as Baltazar N, a 25-year-old said to have guarded the room where the slain youngsters were tortured in a Union Tepito centre of operations.
No details regarding the reason for the youngsters’ murder have been disclosed yet.
Claudia Sheinbaum, Head of Mexico City’s government, said: “What happened with the two children in our city is extremely painful and very serious.
“It’s unacceptable that criminal gangs commit these crimes.”