A Texas gunman fatally shot three people in a violent rampage spanning several cities before turning the gun on himself, according to authorities.

Cops responded to a shooting in Sugar Land — 19 miles southwest of downtown Houston — around 1 p.m. Wednesday and discovered a woman with several gunshot wounds behind the wheel of a white SUV that had veered off the road, the Sugar Land Police Department said in a statement .

Though the incident was initially thought to have been sparked by road rage, cops later confirmed that the woman and the gunman had a relationship with each other, police said. 3

“This incident was not a random act of road rage violence,” the department wrote.

Two witnesses helped authorities perform life-saving measures on the victim before she was brought to a

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