NOGALES, Ariz. -- Federal authorities in Arizona and Mexico shut down an incomplete drug-smuggling tunnel Friday in Nogales.
A task force developed information that a tunnel was being constructed inside a residence located in Nogales, Sonora.
That's just a few yards south of the international border fence near the Mariposa Port of Entry in Nogales, Ariz.
Task force members notified Mexican authorities and they subsequently discovered the tunnel entrance in a backyard shed at the residence.
The tunnel is approximately 449 feet long with about 60 feet in Mexico and 389 feet in the U.S.
The tunnel is roughly 4 feet tall and ends underneath a canyon just east of the Mariposa port.
Authorities say no people or drugs were found inside the passageway and no arrests have been made in the case.