Drug smugglers have responded to the construction of a strengthened section of U.S.-Mexico border fence at Nogales, Arizona, by packaging marijuana to fit through gaps between the bars of the structure.

The 2.8 miles of border fence in question was recently completed at a cost of $11.6 million dollars. It was designed to be highly secure, at 30 feet high in some parts, as well as five feet below ground.

However, it has gaps four inches wide between the bars, which officials said would mean that border security agents could see any assailants trying to attack them with projectiles from the Mexican side.

Local law enforcement have found marijuana wrapped in long, thin bundles, which they think was designed to fit through between the bars, according to a report in Nogales International

A report from the same newspaper earlier this month said that smugglers had taken to throwing packets of drugs over the new, higher fence — wrapping drugs in football-shaped parcels for a more aerodynamic effect.