Two of the girls are seen in the footage attacking the woman, pulling her hair and pushing her to the ground.
A third girl filmed the attack on the mom, who is pregnant, The Sun reported.
As the group clobbered the mom, a teen boy suddenly ran over and kicked the toddler in the head, the report said.
The mom of the teen boy defended him on her Facebook, claiming the tot kick was an “accident,” the Mirror reported.
“He didn’t try 2 kick that baby he tried 2 jump over the baby on to her and made a mistake…as y’all can see the baby ran from under the girl fighting while he was coming down,” said the mom, who was not identified in the report.
“My kid is not that type 2 kick a baby…accident [sic] happen.”
They were able to speak to a female victim, who had suffered a minor head injury and was able to identify her assailants.
The accused attackers’ names have not been released pending charges.
Police said they are actively investigating and the case will be referred to the St. Clair County States Attorney’s Office.