Earlier this week, Mexican federal police in Sonora came across a panel van with modifications and additions that allowed it carry a “cannon” possibly used to launch drugs over the border into the US.

According to a release from the federal police, officers came across the van while it was parked in northwest Sonora state’s Agua Prieta municipality, which borders Arizona and Texas. The van was found without license plates and its doors were open.

Inside the vehicle, authorities found “an air compressor, a gasoline motor, a tank for storing air and a metallic tube of approximately 3 meters in length (homemade bazooka).”

The “unit,” as the release referred to it, also had a cut in the end that could have allowed the metal tube to be hooked up to launch projectiles, possibly across the border.