PINELLAS PARK — A man was arrested late Thursday after he fired on a K-9 unit that was tracking him, police said. Police found Jason M. Lopez, 30, in the 5500 block of 92nd Place N just before 10 p.m. A woman who said she was pregnant with his child told police Lopez battered her. When police approached, Lopez fled into a backyard. Two K-9 units arrived to track Lopez through the neighborhood. One team saw him in the backyard of 5801 91st Ave. N., but he refused an order to surrender, police said. A dog was sent to apprehend him, but Lopez fired at the dog, police said. Neither the dog nor his handler were hit. Lopez was seriously injured by the dog and spent the night in the hospital, police said. Upon his release, he was charged with aggravated battery on a pregnant female, carrying a concealed firearm, aggravated assault on a law enforcement officer, resisting arrest with violence, attempted offense against police dog, great bodily harm or death and armed burglary.