A graphic video of a shooting incident involving Brigham Young University football prospect Charles West surfaced Monday, hours after the Texas native suffered a gunshot wound to the arm. It’s unclear what prompted the altercation between West, 18, and an unnamed assailant who remained in police custody as of Tuesday.

The shooting occurred early Sunday at Coppell Middle School East in Texas. In the video, West exited a green truck and approached a group of men who stood nearby. He turned and fled after one of the men brandished a gun and began to chase him. The gunman fired six shots at West, one of which struck him in the arm. The video, which contains graphic content, can be viewed below, courtesy of D Magazine.

West received treatment at a local hospital for a gunshot wound to the arm and was released, WFAA-TV reports. Coppell police arrested the gunman after West identified him in a lineup, but have declined to release his name until additional witness interviews were complete. Authorities also asked the public to come forward with any other videos of the shooting. Roughly 10 people purportedly witnessed the attack.

“We believe that he was an acquaintance of West,” Coppell police spokesman Sgt. Sammy Lujan said in a statement, according to WFAA-TV. “Charles West was able to identify him in a lineup.

West tweeted about the incident shortly after midnight on Monday, just hours after it took place. “For all who is concerned I’m fine. May the lord be with everyone,” he wrote.

A three-star college football prospect who played running back at Coppell High School, West committed to play for Brigham Young University in February, Yahoo Sports reports. West was arrested for aggravated assault later that month after he allegedly sexually assaulted a woman at knifepoint, but his lawyers have maintained his innocence.