A Denver mother has been arrested for investigation of third-degree assault on a bus driver after an altercation was caught on cell phone video.

Denver Police said that the bus driver pulled the bus over because the kids were being "unruly." Children on the bus called their parents who showed up to pick them up.

When the bus driver would not allow the kids off the bus, things went from bad to worse. Brandi Martin, one of the child's parents is seen on the video "repeatedly striking the victim in the face with a closed fist." She was charged with third-degree assault of an at-risk adult.

SOURCE: CBS DENVER