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ARLINGTON, Texas (WJW/AP) — Police caught the suspected gunman following a shooting at a high school in Arlington, Texas.

Arlington police said four people were injured at Timberview High School Wednesday at about 9:15 a.m. One victim had minor injuries and refused treatment. The three others were taken to the hospital.

Police said the suspect is 18-year-old Timothy George Simpkins. He was taken into custody without incident and charged with multiple counts of aggravated assault.

Police said, based on video, the shooting started with a fight in a classroom. Emergency crews received multiple 911 calls, including one identifying Simpkins as the shooter.

The police department said officers were doing a “methodical search” through the school, and were working closely with ATF and the U.S. Marshals.

Students were taken bus to the Center for Performing Arts after the school was secured.

The shooting came just days after a shooting at a Houston charter school that injured an administrator. Texas’ deadliest school shooting occurred in May of 2018 when a then-17-year-old armed with a shotgun and a pistol opened fire at Santa Fe High School near Houston, killing 10 people, most of whom were students.

**Editor’s note: The Associated Press corrected an earlier report that stated four people had been shot; police say two of the four people injured were shot**