Anne Arundel County police said a dog injured three people in Shady Side Sunday night.
A 29-year-old woman went to pet a 2-year-old pit bull/labrador mix on a cable lead in the front yard of a home about 8:30 p.m. when the dog bit her and a teenage girl who tried to stop the attack, police said.
The dog slid out of its collar and injured the teenager's arm. A 56-year-old also intervened and was slightly injured, officers said.
The dog's owners caught the dog. Animal Control officers took the dog.
The 29-year-old woman was taken to a hospital. The other two were treated at the scene.