Fort Carson bomb experts were called to check on nearly 500 practice rockets being carried by a semi-trailer that crashed Wednesday morning in Interstate 25 north of Denver, a post spokesman Lt. Col. Steve Wollman said.

A passenger in the truck suffered non-life threatening injuries in the one-vehicle crash, which took place at 5 a.m. on Interstate 25 at state Highway 7 near Broomfield.

The semi was traveling north on Interstate 25 when it hit a cement barrier in a construction zone, according to Wendy Forbes, spokeswoman for the North Metro Fire Rescue Office, spilling 50-60 gallons of fuel onto the interstate.

Firefighters noticed that the trailer contained 10 pallets with 48 practice rounds each. The rounds were 2.75-inch practice rockets that are used by helicopters to practice air-to-ground gunnery, according to Wollman.

The rounds were declared safe after the Adams County Bomb Squad and the Fort Carson Explosive Ordinance Team assessed the situation, Wollman said. Another vehicle was sent to pick up the rockets, he said.

A commercial contractor was transporting the load, Wollman said.

The driver was cited for careless driving causing injury, Broomfield police said.

It is unknown where the practice rockets were headed.