By The Associated Press

Authorities have destroyed more than 4,500 marijuana plants found growing along the Centennial Wash near Wenden in southwestern Arizona.

U.S. Drug Enforcement Administration and Arizona Department of Public Safety officials say the plants were 3- to 6-feet high and were located in four separate grows throughout the one-acre site.

They say the marijuana cultivation operation was located in the middle of a grove of salt cedar trees, near the edge of a small tributary in La Paz County.

Each of the four grows had its own irrigation system powered by a pump that emitted water through an underground drip system.

Authorities say the field had a security fence that surrounded the entire field and an abandoned rifle was found at the site.

No arrests have been made.