MEXICAN soldiers executed up to 15 surrendered people in a massacre at an abandoned warehouse in June, the National Human Rights Commission has said.

A commission report published on Tuesday laid out allegations of threats, torture, fake autopsies and crime-scene manipulation designed to cover up the crimes.

It gave the most gruesome version yet of what happened in the June 30 mass killing of 22 alleged gang members, including three teenagers.

The report contradicts army assertions that all the victims died in a gun battle after soldiers came under fire in the town of San Pedro Limon.

Commission president Raul Plascencia called on prosecutors to investigate the possibility of a cover-up.

Survivors of the shooting were reportedly threatened with rape and tortured into supporting the army’s version of events and prosecutors in Mexico state allegedly altered autopsies.

So far, eight soldiers face disciplinary charges and three have been charged with homicide for an incident the army and the Mexico state prosecutor’s office initially denied happened. 

The report comes in the wake of the September 26 disappearance in the small city of Iguala of 43 teaching students who were arrested by police officers, allegedly acting in cahoots with a criminal gang. They are still missing and feared dead.

The incident has led to large-scale protests all over Mexico and beyond. 

They had been in Iguala to raise funds for their school and commandeered three buses to take them back to Ayotzinapa at the end of the day.

Three students and three passers-by were killed in the shooting at the buses and some students escaped. 

At first, it was thought the students’ dismembered and burned bodies were among those found in some mass graves outside Iguala, where local farm families say gangsters often bury their victims. 

However, the Mexican attorney general has said that the bodies examined so far are not those of the students.