State police say a trooper shot and killed a pit bull who attacked another officer at a home in rural Queen Anne's County.

It happened Thursday night in Millington. Police were responding to a report of a man firing a handgun during a party at his home.

Twenty-three-year-old George Thomas allegedly fired the gun at the ceiling and held it to the head of his sister, 20-year-old Jessica Thomas.

George Thomas faces charges including first-degree assault and reckless endangerment. His sister has been charged with trying to impede the troopers who responded to the scene.

Police say the dog attacked the troopers as they were arresting Jessica Thomas and a 17-year-old girl.

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Information from: The Star Democrat of Easton, Md., http://www.stardem.com