It started at around 7 p.m. Thursday night when CBP officers say they tried to stop a man driving into Mexico for a routine auto inspection.
CBP officers assigned to the Office of Field Operations (OFO) at the Pharr International Bridge came upon a tractor-trailer hauling a commercial shipment of fresh produce consisting of fresh bell peppers crossing into the US from Mexico.
Nogales Mayor Arturo Garino told FOX10 Phoenix that he heard from other city officials that the driver was attempting to cross south into Mexico at the DeConcini Port.
The Nogales City Council passed a resolution Wednesday condemning the installation, describing the razor-sharp wire as "lethal" and "inhuman".
The council's resolution says the razor wire would harm or kill anyone who scales the wall and "is only found in a war, prison or battle setting" and shouldn't be in downtown Nogales.
There was a similar incident at a different Nogales port almost three years ago.
A message seeking comment from U.S. Customs and Border Protection was not immediately returned. The U.S. military initially placed concertina wire along the top of the wall in November.
The mayor of Nogales, Arizona is threatening to sue to the federal government if it doesn't remove razor wire that now covers an entire stretch of border wall in the city.
After shots were fired, CBP says the auto continued to roll across the border when Mexican authorities gave the man first aid.
CBP planned to release additional information Friday. Illegal crossings in that area have dropped steeply in recent years.