A Sharon patrolman shot what police called an "aggressive" pit bull that was running loose Tuesday morning around the city's wastewater-treatment plant on Stewart Avenue.

Police said they were called to the plant at 5:25 a.m. because two pit bulls, a male and a female, were loose in the area of the plant. Police said they called Shenango Valley Animal Control, and while they were waiting for agents to arrive, the female dog became very aggressive.

The dog bared her teeth and charged at the patrolman and a plant employee, police said.

The patrolman had a rifle and killed the dog with one shot, police said.

The male dog did not become aggressive, and police said they controlled it until animal control agents arrived.

Police said neither dog was wearing tags, and they didn't know who owned them.

Sharon police also shot and killed a dog last month. They said it became aggressive near a group of children on Cedar Avenue.