WATCH: Cop sued for cuffing children

According to CNN the ACLU is suing Kenton County sheriff's Deputy Kevin Sumner who is accused of handcuffing an 8-year-old boy and a 9-year-old girl, who both have attention deficit hyperactivity disorder.

WARNING: May upset sensitive viewers

Cell phone video obtained by the ACLU captured one incident in which Sumner talks to a boy handcuffed in a chair. The boy is so small that he's handcuffed around his upper arms and not around his wrists.

The handcuffs were removed after about 15 minutes, the ACLU said, citing school records.

The ACLU said the girl was twice handcuffed behind her back by her biceps and was also in pain.

"Both children were being punished for behaviour related to their disabilities," the ACLU said in a statement. - CNN