A brush fire is burning off the Catalina Highway near the Gordon Hirabayashi Recreation Area and crews are on the scene.
The Bug Fire has burned about 25 acres, according to initial reports.
It is burning brush and grass on the east side of the highway up to Mount Lemmon.
Three engines and a hotshot crew are working to put the fire out. An air tanker, a helicopter and more hand crews have ordered to help with the blaze.
There are no road closures, but motorists are urged to use caution on the Catalina Highway near milepost 7 since there are fire crews and vehicles in the area.
Also, the Arizona Department of Forestry and Fire Management will implement Stage II fire restrictions across all Southern Arizona state-owned and managed lands on Tuesday. Restrictions will impact Cochise, Greenlee, Graham, Pima, Pinal, and Santa Cruz counties.
All campfires are prohibited during Stage II restrictions.
The state said the BLM, Coronado National Forest and Saguaro National Park will also be implementing Stage II fire restrictions on their lands Tuesday.
