HARLINGEN – It’s a case of stolen, stashed and seized along the border. Mexican authorities found the weapons hidden in a bunker in Reynosa.

Mexican military soldiers and the people who live in Reynosa are on the lookout.

"The truth is that it has always been the same. I don't know if it's the same or worse, it's the same, there has always been gunfire,” said a Reynosa resident.

The identity of this man from Reynosa is hidden for his protection. He’ll be called “Raul” in this article.

Raul crosses into the United States from Reynosa often. He shops at the flea market for his family. He said the violence is part of everyday life.

"Sometimes it continues through days, then sometimes it calms down and nothing happens. When it gets really crazy, it will last for days,” said Raul.

Mexican authorities uncovered 17 assault rifles.

“It's a possibility they came from (the U.S.),” said gun shop owner Bryan Guerra.

They also discovered two Barrett rifles.

"It's highly unlikely they were sold in Mexico through legal means,” said Guerra.

They found rows of ammunition, 21,000 liters or more than 5,500 gallons of fuel, five vehicles and two explosive devices.

"There's no way possible a civilian purchased that through legal means and then sent it across. It had to be stolen or lost somehow obtained illegally,” said Guerra.

Guerra operates imports and manufactures firearms, and buys special devices from other countries.

"The U.S. Government does a lot in order to make sure whatever comes into the country is monitored or and inspected. A lot of those inspections aren't the same in Mexico,” said Guerra.

Guerra explained any type of firearm is difficult to trace.

"There's no possible way of tracking where it goes all we know is that a person has purchased it and they passed the federal background check, but we're under no obligation, nor do we have any means of tracking any kind of weapons,” said Guerra.

Raul will continue to cross this bridge and, as he does every day.

"There would be machine guns, 50 calibers; I don't know what other calibers there is but they are long weapons,” said Raul.

He said he’ll keep his eyes out for anything out of the ordinary.

Three people were arrested in Mexico in connection to the weapons stash.

A spokesperson for the Bureau of Alcohol, Tobacco, Firearms, and Explosives or ATF, said they are waiting to get more information on this incident and are not involved at this time.

This is a developing story and will be updated.