They say it happened in the 15-hundred block of Fillmore around 8:15 this morning.
A man and his nephew, later identified as Oscar Garcia, got into an argument that continued in the front yard of their home.
And, that's when police say 41-year-old Garcia began hitting his uncle with a hammer.
The victim was taken to the hospital with head, chest, and arm injuries.
Garcia is charged with aggravated assault family violence and he's in the Wichita County Jail.
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