11-year-old boy arrested after threatening mom and baby with a gun on Oregon train

(CBS/AP) PORTLAND, Ore. - Portland transit police arrested an 11-year-old boy who allegedly threatened a woman with a baby by displaying a loaded gun during a dispute on a light rail train.

Officers responded Thursday night to learn that a group of boys and girls that had a dispute with another passenger. The incident happened after one of the boys bumped into her baby stroller when they boarded the train.

Police Lt. Robert King says that during the argument with the baby's mother, an 11-year-old boy lifted his shirt to show the woman a gun in his waistband, then started to pull the gun out. King says the woman backed away and the boy put the gun back in the waistband.

The woman called 911 and the train stopped downtown. The woman identified the boy to officers who recovered a loaded .22 caliber semi-automatic handgun.

The boy was taken to juvenile detention.