U.S. and Mexican authorities, in a joint operation, discovered an unfinished tunnel some 40 meters (130 feet) long on Arizona's southern border, it was reported Thursday.

U.S. Border Patrol agents working with Mexican federal police found the tunnel on Wednesday west of the DeConcini crossing point in the border city of Nogales, Arizona.

The Tucson sector Border Patrol reported Thursday in a press release that Border Enforcement Security Task Force, or BEST, agents found the tunnel after noticing recently-moved earth near a drainage canal.

Authorities said that the unfinished tunnel originated on the Mexican side and ran toward the United States but did not have an outlet in this country.

The tunnel is approximately 1 meter (3.3 feet) high.

The Border Patrol said that tunnels continue to be used by criminal organizations to bring illegal drugs into the United States via southwestern Arizona.

In December, authorities reported the discovery of another tunnel, also in Nogales.

According to U.S. government figures, the Arizona-Mexico border continues to be one of the main corridors through which drug running and migrant smuggling are conducted. EFE