“No words can adequately express the sadness we feel at this moment as we contemplate the loss of yet another law enforcement officer in the line of duty,” Papenfuse said. “I extend my sincerest condolences to the family of the slain U.S. marshal, to his colleagues and to all law enforcement officers who risk their lives each day to protect and to serve our city and our nation.”

Dauphin County District Attorney Fran Chardo, whose territory includes Harrisburg, said the officers were part of a marshals service task force. He said there is currently no danger to the public.

The shooting occurred at a home less than two miles from the state Capitol, in a working class neighborhood of duplexes, single-family homes and commercial buildings.

Police were keeping people well away from the scene as they investigated.

A spokeswoman for the local coroner’s office declined comment.

The incident is near where police shot and killed an Egyptian immigrant on Dec. 22 after he wounded a state trooper and shot at another officer near the Capitol. That man is believed to have acted alone.

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Associated Press writer Marc Levy contributed to this report.