A 15-year-old Lincoln boy was arrested on Friday after police said he robbed another teen near 12th and B Streets in Lincoln.

Police said the older boy took a $20 bill from the 14-year-old boy and when the younger boy tried to get his money back, that's when police said it turned violent.

They said the 15-year-old boy pulled out a knife and threatened the younger teen. Police said they eventually caught up to the 15-year-old and lodged him at the Youth Detention Center for robbery.