Boxes of ammo teens allegedly stole from federal marshals trailer (Courtesy of Anne Arundel County)

TSA officials say they are investigating to see whether procedures were not followed, after three teenagers were found in a vehicle within 70 boxes of ammunition intended for law-enforcement use.

Authorities said the teens — ages 18, 16 and 15 — were suspected of involvement in a break-in early Sunday at a trailer owned by the federal air marshal program, which is part of the Transportation Security Administration. Police said the trailer was in the 7400 block of New Ridge Road in the Hanover area of Anne Arundel County, about one mile from the terminal at Baltimore-Washington International Marshall Airport.

Officials said ammunition is typically stored in a more secure facility. The trailer had two double locks on it and the ammunition had been left there after it was used in a training exercise on a firing range.

Police said the youths were found just before 2 a.m., seven or eight miles away in the Brooklyn Park area, near Cresswell and Robinwood roads. Their vehicle had been traveling in a suspicious manner, police said. Bolt cutters, flashlights and latex gloves were also found in the car, police said.

Police charged Brandon Michael Shreve, 18, of Linthicum, with multiple counts of theft. A 16-year-old from Glen Burnie and a 15-year-old from Baltimore were also charged. Their names were not released because they are juveniles.

Brandon Michael Shreve, 18, of Linthicum was one of the suspects taken into custody. (Anne Arundel County Police Department)

This report has been updated.