Three Chicago teenagers were arrested and accused of beating to death a Mexican immigrant and then posting a video of the attack on Facebook.

Delfino Mora, the father of 12 children ranging in age from 17 to 40, was found unconscious and bleeding last Tuesday morning in an alley in the Rogers Park neighborhood.

The 62-year-old immigrant was taken to a nearby hospital, where he died several hours later as a result of severe head injuries, according to the autopsy report.

Police said Monday that during their investigation of the incident officers were alerted that a video apparently filmed by the attackers was circulating on the Internet and showed the beating and Mora being punched on the chin and having his head smashed against the pavement.

The first person to be arrested in the murder was suspected gang member Malik Jones, 16, identified as the owner of the Facebook page where the video was posted and also the main attacker.

Jones, who was charged with first-degree murder, is being held without bail and will be tried as an adult, according to a police communique.

Later, Nicolas Ayala, 17, and Anthony Malcolm, 18, were also arrested in the slaying and charged with first-degree murder and robbery.

Police also accused them of taking turns using Jones' cellphone camera to film the attack, and before commencing to beat their victim they first forced him to empty his pockets. EFE