READING, Pa. -

A 15-year-old boy was arrested on his birthday moments after Reading police said he robbed a food truck at knifepoint.

The holdup happened around 11:20 a.m. Monday on the parking lot of a car wash in the 1800 block of Kutztown Road.

The teen, armed with a knife, approached the truck and demanded money from a worker inside, police said.

"That is very sad that our society has come to this, you know holding up other children. Children holding up children, that is sad," said Wilma Herrera, the owner of El Carreton Del Sabor.

The suspect made off with $20, but he didn't get very far before he was apprehended by responding RPD officers.

Andrew Butler, an employee at nearby H&B NAPA AutoCare, said he's seen the teen often leaving trash in the business' parking lot, but he never expected this.

"The kid is always around. He always seemed like a little bit of trouble, but I guess I was surprised he actually did it," Butler said.

The food truck's owner said she is just happy police caught him so quickly.

"I am very happy they did their work fast enough and my son was not hurt. I am glad for that," said Herrera.

The teen, whose name is being withheld because of his age, was transported to police headquarters for questioning. Police have not yet said what charges will be filed. No one was injured.

Fifteen is the age at which police can start charging teenagers as adults for very specific crimes, investigators explained.

The teen is now facing robbery with a weapon, possession and instrument of crime, theft and receiving stolen property.