Authorities are trying to contain a large brush fire near the southern Arizona town of Arivaca that reportedly was started by accident by a Davis-Monthan Air Force Base airman.
Base officials say the fire broke out about 12:30 p.m. Monday three miles north of Arivaca during an Air Force base combat search and rescue training mission.
As part of the training mission, Davis-Monthan officials say an airman on the ground attempted to signal an aircraft overhead in order to indicate his location and inadvertently started a fire.
Crews from the Rio Rico and Arivaca fire districts are working to contain the fire in Amigo Wash.
It is fueled by grass and brush, but there are no immediate reports of any property damage.