PHILADELPHIA – A group of girls beat up a woman in Delaware County, videotaped it and posted the attack on Facebook, according to Chester police.

A group of six girls approach the woman, who was out on her stoop. Police say all of the suspects are between 16 and 17 years of age.

One of the attackers starts punching the 48-year-old woman who also has a mental disability. The attack then moves inside the home.

All six girls accused of beating woman in custody. A local parent saw the video on Facebook Thursday morning and tipped off police.