Two new wildfires are burning in Southern Arizona, while a third fire east of Tucson is now fully contained.

The Cottonwood Fire has burned about 50 acres in the Whetstone Mountains, southwest of Benson.

It was started Monday by lightning and is burning mainly grass and brush, according to the Coronado National Forest.

Two crews, three engines, a water tender, two single-engine tankers and one helicopter are fighting the blaze. There are no structures threatened, according to a news release from the forest.

Another smaller fire, also caused by lightning, is burning in the Leslie Canyon area in the Chiricahua Mountains.

The Hunt Fire, which began Monday, has burned about one acre as of Tuesday afternoon. Two engine crews are assigned to this fire.

Forest officials also reported that the Fox Fire, burning since June 16 in the Rincon Mountains east of Tucson, is fully contained. The blaze scorched about 7,500 acres.