NOGALES, Ariz. - Custom and Border Protection officers in Nogales have seized a sniper rifle and arrested two teenagers trying to cross into Mexico with the weapon.

Customs and Border Protection said Thursday that officers working southbound inspections on Tuesday night referred a car for further perusal. During the inspection, officers found the .50-caliber Armalite bolt-action rifle on top of the vehicle's engine.

The 19-year-old driver and his 17-year-old male passenger, both from Mexico, were arrested and turned over to U.S. Immigration and Customs Enforcement.

Officials say the discovery of the dangerous weapon may have saved lives.