Laredo police say they made one of their largest weapons seizures in years after pulling over a truck laden with brand new assault rifles, bayonets and ammunition that they believe was headed to Mexico.

The seizure…came less then two weeks after Mexican President Felipe Calderon asked Congress to help stem the flow of guns from the U.S. into Mexico.

Acting on a tip from the Webb County Sheriff’s Office, Laredo police stopped a vehicle containing 147 new, boxed assault rifles, 200 high-capacity magazines, 53 bayonets and 10,000 rounds of ammunition. One of the two men in the vehicle tried to flee, but was apprehended, said Laredo Police Investigator Joe Baeza.

Baeza said…it was the largest weapons seizure in a decade in the area around Laredo, which is 145 miles south of San Antonio along the U.S. border with Mexico.

U.S. Immigration and Customs Enforcement and the Bureau of Alcohol, Tobacco, Firearms and Explosives are investigating the seizure, but Baeza said the presumption is the vehicle was heading to Mexico.

“Two Joe Blows aren’t going to buy a bunch of weapons and it stops there,” Baeza said. “We’re pretty positive it was headed to Mexico.”

Are you certain? They may just have been a couple of law-abiding NRA members on their way to target practice.