The Washington, D.C., police department will no longer place juvenile suspects age 12 and younger in handcuffs, the department said Tuesday after a series of alarming incidents caught on cellphone video.

Metropolitan Police Department Chief Peter Newsham announced the policy change Tuesday morning.

"The default will be not to place handcuffs on juveniles under 12," he said.

After a series of incidents of police handcuffing kids, Chief of @DCPoliceDept is announcing new policy. pic.twitter.com/AkRjU6WcXK — Mark Segraves (@SegravesNBC4) January 28, 2020

An MPD document says officers are prohibited from handcuffing children "unless the juvenile presents a danger to themselves or others."

Officers have discretion to handcuff juveniles age 13 to 17 "based on the severity of the offense and circumstances of the interaction," the document says.

Now @charlesallen asking how @DCPoliceDept will determine age and how will new policy be monitored. Chief says determining age can be tough and they may rely on @DCCFSA for help. pic.twitter.com/uuA5oTIE3D — Mark Segraves (@SegravesNBC4) January 28, 2020

Police put a 10-year-old boy in handcuffs near Union Station in April.

D.C. police said they handcuffed a 10-year-old boy suspected in an armed robbery, but did not arrest him when they learned how young he was. News4's Meagan Fitzgerald spoke with the boy's mother.

"It traumatized him real bad," his mother told News4. "He couldn't even sleep last night."

The department said the child was suspected of being part of a group of juveniles who stole a cellphone at gunpoint. They said they didn't realize the boy was so young.

The boy was not charged was "totally innocent," the District's attorney general later said.

In November, officers detained a 15-year-old girl and her 10-year-old brother for selling food on a sidewalk in Columbia Heights.

A video shows D.C. police officers physically detain two children who were selling food on a sidewalk without a permit. News4's Shomari Stone reports.

Stay with News4 for more details on this developing story.